Is polygonal rifling more accurate


A cut barrel even with a straight twist is more uniform and consistent than a I feel even a slight gain twist will help accuracy wise and not hurt a jacketed bullet   Why is the Compak 16 more accurate? How does the Compak The Barrel – Heavy contour with Progressive Gain Twist Polygon Rifling. Our rifling machines are so accurate, we can carry the twist rate to the 4th decimal point (example: 11. 40 S&W if they were half their price. If anything, polygonal rifling is slightly easier to clean up due to the smoother surfaces, but you aren’t likely to see any real difference in accuracy. That gun was a tack driver by the way. The most accurate (tight groups) pistol I have is a CZ 82, but not sure if is the polygonal rifling or the fixed barrel. As far as cut rifling v polygonal, ask 10 experts and get 10 opinions. On the other hand since there are less grooves the barrels becomes more accurate and bore surface forms more consistency. The price difference is simply the cost difference paid to our primary barrel supplier, Rock Creek. Dec 5, 2013 Also, they are in theory more accurate. Nov 07, 2019 · The hexagonal polygonal rifling meant that the projectile did not have to bite into grooves as was done with conventional rifling. Hexagonal, or Octagonal on the . 84. Polygonal Rifling. I'm 6" - 3" and go about 240 Lbs. The present invention relates to polygonal rifling of a gun barrel to provide grooves and bores in the gun barrel separated by a flat area which tapers from the bore to the groove. An aftermarket barrel might be more accurate. The design of 5R rifling has offset lands & grooves which causes less bullet deformation, which is supposed to lead to more accuracy from a less deformed bullet with equally applied pressure as it travels down the bore. 308 Winchester using the Barnes 150 grain MPG lead free. fractions of a minute of arc) is a realy concern? 5r rifling is favored for accuracy as it causes less bullet deformation during barrel transit. First, it’s common for velocities to be slightly higher in any given cartridge. Polygonal rifling (/ p ə ˈ l ɪ ɡ ə n əl / pə-LIG-ə-nəl) is a type of gun barrel rifling where the traditional sharp-edged lands and grooves are replaced by less-edged "hills and valleys" in a polygonal pattern, usually taking the form of a hexagon or octagon. The cut barrels can also be ordered with more custom twist rates, groove profiles and diameters. polygonal rifling is more common than you think. As to your original question, I’m only aware of Jarvis. Oct 21, 2014 · The Broached method of rifling is an increasing-diameter tool that is pulled through the barrel stock to cut, set and polish the barrel as it is pulled all the way through. Traditional rifling has more than three sides, so I don't see a difference that matters. Aug 31, 2014 · Most big game rifles use traditional rifling, while an example of polygonal rifling would be the type used in Glock® pistols. ” Apr 25, 2017 · The new barrel is 16. Lead Bullets in Polygonal Rifling? (H&K) This is a discussion on Lead Bullets in Polygonal Rifling? (H&K) within the Handguns forums, part of the Gun Forum category; H&K 45 specifically. Its also suppose to marginally increase muzzle velocity. Besides for the extra mag and ability to change the sights, the premium 9mm pistol has polygonal rifling and more durable components which makes it more accurate and resilient. Whitworth believed that the same type of system could be used to create a more accurate rifle to replace the Pattern 1853 Enfield. Button Rifling. Very accurate, indeed, and more than adequate for serious social work. The HK barrels on the 91 and pistols were hammerforged with polygon rifling in the '80s, Glocks followed. Oct 06, 2010 · More . Progressive gain twist is novel. Also there is no sharp corner to fill like in polygonal rifling. Same company Black Hole Weaponry LTM AR15 Barrel Review Black Hole Weaponry 16” LTM AR15 Light Weight Tactical Mid-Length Barrel Polygonal Rifling 1:8 . 308" 1:10" twist for the . The polygonal rifled BHW offer all the finish and cool fluting options you could ever want and always deliver amazing accuracy. 0-inch 50-yard groups. 750 1-8 Polygonal Rifling AR15 Barrel . Plus you have to go with whatever happens to be available, which, granted, is usually a decent selection. The present invention relates to rifling of gun barrels. Rebuild the HK proprietary Polygonal rifling muzzle bushing. Polygon rifling does not lead more than any other type of rifling. The term 'polygonal' sounds to me like a marketing term, not a technical one. I have been in contact with PAC-NOR about a 24",#1 Sporter, 1-10", polygonal via email about the new barrel. I have shot . Precision pistols, such as used in bull’s-eye and IHMSA completion almost universally use traditional cut rifling. 356 and . 5″ barrel weighs 20 grams more than our 18″ barrel with light profile. If you google rifling profiles images you will see plenty of explanatory pictures. Couldn't find a one. I have been shooting rifles with 5R and one thing is certain: the barrels I have been shooting have been very, very accurate. NEW. The twist is exact, where as other forms of rifling can have variances due to the process they use. David Tubbs use Schnider's polygon in his competition rifle and swears by it. J. 56 MidLength . 36 pounds. 358 bullets and the . Also, the bore and groove dimensions are more Dec 21, 2013 · Glocks just never did it for me, and I wouldn't own one chambered in . The MRR system significantly extends the life cycle of the barrel. Your thread somewhat answered my question about some bullets (as I was told by a good gunsmith) simple don't like polygonal rifling. It’s for super-high-volume production… The large companies tend to use the hammer forging, intermediate size companies tend to use the buttoning, and craft companies tend to use the cut rifling. We achieve our results, in part, through our single-edge polygonal rifling (SEPR)  Jan 2, 2014 Krieger barrels were once again the second most popular barrel used, Our rifling machines are so accurate, we can carry the twist rate to the 4th book here: Excerpt on Schneider Polygonal Rifling from The Rifle Shooter. Another difference in barrels worth noting is polygonal rifling versus traditional rifling. Polygonal rifling explained. A hardened steel mandrel is produced with the shape of the rifling formed on its outer surface. Glock is known for their polygonal rifling in their stock barrels, which offers great accuracy. They can all be accurate. Rifling is accomplished on computer controlled machines where we can control any given twist rate and rifling form. Trying to figure out why Glock went with polygonal rifling when he designed his gun. However, Glock is the only manufacturer that warns against shooting lead bullets, as it could cause a buildup when paired with this type of rifling which the company warns could lead to safety hazards Nov 17, 2012 · The problem with lead bullets in a polygonal barrel is that the lead doesn't have the right properties to perform well, and usually ends up with stripping. In traditional rifling, ‘tools’ such as buttons or broaching bits are used to either press or cut grooves in the bore giving the barrel a defined rate of twist. Here's why: If polygonal rifling were actually more accurate, why aren't all the custom 1911 gunsmiths using it on bullseye guns, and why don't you see it in benchrest rifles, where accuracy (i. Jul 29, 2013 · The SIPR and Feddersen’s lapping/honing process delivers a very smooth surface which reduces bullet deformation and fouling and of course increases accuracy; the result is a cleaner running, more accurate rifle that requires less maintenance. Polygonal Rifling (gives for more accurate If you are searching for read reviews 300blackout Barrel 3 Polygonal Rifling price. With 155 grain JHP, and 165 grain FMJ's, the CW40 always had 10 - 20 more feet/second. Thanks for the clarification. Aug 16, 2014 · Radical Gain-Twist Barrel for AR and High Power Rifles “Gain-twist” refers to a form of barrel rifling where the twist rate gets tighter over the length of the barrel. Jun 06, 2015 · Polygonal rifling is more like conventional rifling but with shallower slopes from the grooves up to the bore. The barrels are also generally more accurate because there is I have since tried another polygonal barrel and it fouls so bad so quick that I spend more time cleaning it than shooting it. between pac-nor and krieger, buy whichever tickles your fancy as they both make excellent barrels. The barrels in Chrome Molybdenum steel can come with the new MRR Multiradial Rifling (see caliber table), where the bullets are not severely deformed as happens with traditional and polygonal rifling, and accuracy is greatly enhanced. When clean she shoots great. May 15, 2009 · Polygonal rifling does not cost any more to make than conventional rifling if the same rifling method is used. 45 and 9MM Glocks all with FACTORY barrels and lead bullets and they all did just fine. In 1856, this concept was demonstrated in a series of experiments using brass howitzers. . 5mm Carcano Models 1891 and 1941, which served Italy through two world wars. Top Quality Barrel for your Custom Build! Polygonal 3 groove rifling and machined finish. if you shoot lead bullets down a poly barrel it will lead to increased pressure and even a catastrophic failure. During the  Jun 8, 2010 Polygonal rifling was an outgrowth of a cold-hammer forging process The barrels are also generally more accurate because there is less  Aug 6, 2012 In the article below I will explain the What is Polygonal Rifling anf In all actuality my pistols are capable of more accuracy than I am able to  The barrels are also generally more accurate because there is less bullet Nevertheless, cold-hammer forged barrels with polygonal rifling are more durable,  Jun 10, 2016 Back in what now seems like a lifetime ago, I spent a year of my life trying to find a way to match fired bullets with their respective cartridge  Nov 13, 2014 Polygonal or wavy rifling has more shallow channels. I'm inclined to agree, gd. May 01, 2012 · There are a few differences between the two pistols worth mentioning. View in 3D. Noveske, LaRue, and Armalite are some popular brands that have models with polygonal rifling. We use our Polygonal Caudle in P3 or P5 rifling known for its accuracy. i have 2 pac-nor polygonal barrels, and they are polygonal nothing like a 5r etc. Oct 12, 2018 · I can't see how the gen 5 is anymore accurate. 45 GAP models, refers to the number of rifling "grooves". No gas escapes around the bullet any more in a conventionally rifled barrel than does a polygonal bore. Activity All Activity Search Leaderboard More . Jun 15, 2019 · I prefer to shoot everything at 880-900 but I am considering a 28-32” . In polygonal-rifled barrels, the barrel (and hence the bore) is cold hammer forged (or The purpose of rifling is to impart a spin to a projectile as it is thrust through the air in order to stabilize it and allow it to be more accurate. 40, 10MM, . Poly rifling does inflect less stress on bullets. They now offer ratchet (canted land) as well as conventional push-button rifling in 3, 4, 5 and 6 grooves. 177 for 15-29 grain slugs than traditional rifling will be used and 28-32” faster than 1:16”. "The term "polygonal rifling" is fairly general, and different manufacturers employ varying polygonal rifling profiles. The G21 is a decent handgun butalso handicapped by polygonal rifling and IMO, the XDm is easily more accurate. Allegedly the polygonal barrels are more accurate. Single point cut rifling is harder to do and more time consuming. Oct 22, 2013 · Non-chrome lined barrels can be very accurate if your on a budget, but just be mindful that they wear out quicker, especially under high rates of fire. Button Rifling; Barrels: Cut Rifling vs. Jan 30, 2019 · Inside the slide, Glock fits a “Glock Marksman Barrel. The reason why the rifling is more accurate is because the bullet doesn't have as much damage when it leaves the bore. I agree with Para that Walther out Glocked Glock but I would also add in the VP9 too. i have come to the conclusion that they are neither more nor less accurate than conventional rifling. From what I understand the only difference is standard rifling and supposedly improved trigger. if they have a problem it is that brushes and patches on jags do not necessarily follow the rifling in a spiral fashion, but rather skip over the rifling. Although the picture just shows the Enfield and the 3 land profiles. Polygonal rifling is also used on some handguns made by Glock, Heckler & Koch, Ceska Zbrojovka (CZ), Kahr arms, Desert Eagle and others. More recently, polygonal rifling, a throwback to the earliest types of rifling, has become popular, especially in handguns. Feddersen’s Single Edged Polygonal Rifling is supremely accuracy so much so that I would argue it offers nearly the same performance as Top End Match barrels, but at this point no one retails them. The Gas Tube – Same  Apr 25, 2017 The most common type of barrel rifling that you will find on most gun Polygonal barrel rifling has a much less defined set of lands and rifling is still tight there is no little to difference in range or accuracy between the two. This means, that the new 16. Because the rifling has no sharp corners to erode, barrels with polygonal bores have a longer, usable life, since they retain their accuracy longer. Show more Show less. Buttoned barrels from proprietary super high-grade German steel. There has also been warnings about shooting lead ammo in a barrel with this type of rifling. AR-15 Chamber Dimensions gain twist rifling is the 6. Compare. Reinforced Chamber Set Base on real gun design, The chamber set combined barrel and recoil spring guide rod, made parts assembled more precision and stable, every shot were be perfect! The specs says they use a polygonal rifling. Feb 02, 2013 · Polygonal refers to the type of rifling. One online source claims that in a Ransom Rest, Glock proved that the G19X is capable of holding 3. The newest mechanical method of rifling barrels is accomplished through a process called hammer forging. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Whitworth believed that polygonal rifling could be used to create a more accurate rifled musket to replace the Pattern 1853 Enfield. Glock and Desert Eagle pistol barrel is a good example of a polygonal barrel. The first batch of barrels have medium a profile and weight of the barrel is 1 070 grams. More accurate? Well That's hard to determine. However, I cannot say it makes any rifle more accurate than traditional May 03, 2019 · Considering that polygonal rifling is used in tens of millions of firearms, including most Glock pistols and a number of Heckler & Koch firearms with high production numbers, polygonal rifling isn’t uncommon at all. S&W revolvers have used polygonal rifling since 1996 and they have published no warnings about shooting lead bullets. Traditional rifling is the process of making helical grooves in the bore of the rifle. Some suggest the rifling profile results in a bit more velocity. Polygonal rifling is a type of gun barrel rifling where the traditional sharp-edged lands and grooves are replaced by less-edged "hills and valleys" in a polygonal pattern, usually taking the form of a hexagon or octagon. Others point to extended barrel life and reduced copper fouling. POLYGONAL RIFLING The oldest, shortest words—yes and no—are those which require the most thou. You may have to register before you can post: click the register link above to proceed. Feddersen produces the most accurate rifling currently on the market. Jul 19, 2012 · The present invention relates to rifling of gun barrels. The performance issue with a polygonal barrel is not a feeding issue. . Is standard rifling supposed to be more accurate than polygonal? A better trigger will definitely help you shoot a gun more accurately but does that make it more accurate? What is 5R Rifling? 5R is an improvement over conventional rifling by changing the shape and configuration of the lands and grooves. More specifically, the present invention relates to rifling of gun barrels to provide rifling having a single edge area and a polygonal area separating the grooves and bore. a . polygonal rifling is shaped like an arc, whereas conventional rifling is squared off at the edges. Black Hole 16" 5. Jan 21, 2015 · Sphinx uses polygonal rifling in the barrel. This appears not to be the case. By the nature of the manufacturing process, cut-rifling puts fewer stresses in the steel and twist rate is more likely to be uniform. Polygonal Rifling in Reloading Ammo for I've been trying to find more information on Polygonal rifling, and so far I have only been able to find out what it is. One of the advantages of polygonal rifling is that it's cheaper. The spiraling pattern (here with normal rifling) is shown. -Zach May 19, 2008 · dear guyz, does anyone knows which one is the best polygonal rifling or rifled barrel? someone says that polygonal is the best barrel now but someone else says that polygonal rifling will have a lead foul if bullet shot with 1125fps Apr 10, 2016 · If they shoot faster, flatter and at least as accurate as their lead counterparts in the poly barrels then I might be able to stomach the cost. For example, a gain twist barrel might start with 1:12″ twist and finish with 1:8″ twist. Looking at having a barrel custom made and was wondering whats the best twist rate for the Grendel. I have been purchasing Super Match SS polygonal barrels from Pac-Nor, I find them extremely accurate, especially with lead free bullets. Jul 25, 2016 · Polygonal rifling has been around for a few generations now; it’s used in rifles and machine guns alike to produce a more reliable, longer-life barrel and is generally considered more accurate The Trials of the Nine are here and they’ve brought with them a trove of lucrative rewards. But a number of firearms manufacturers use polygonal rifling, most notably Glock, H & K, and Kahr. The grooves in Metford rifling were only 2/3 as deep as the Enfield rifling,and so lasted a shorter time to wearout. S. Conventional rifling, while effective, can be improved upon in two ways. We achieve our results, in part, through our single-edge polygonal rifling (SEPR) process. The British military, however, rejected Whitworth's polygonal rifled designs. I am puzzled but agree with your statement that competitive shooters do not seem to favor polygonal rifling. This type has a smaller bore area than the male type of polygonal rifling designed and used by Lothar Walther. 6 million unique visitors over the last year, Practical Machinist is the most visited site for metalworking professionals. The only real benefits I see is a claimed slight increase in velocities and accuracy, but in a pistol there really not much a difference between the two from what I gather. It is supposed to make barrels more accurate. We would recommend this store for you. Oct 14, 2019 · Polygonal rifling uses swells and smoother angles to do the same. So I think barrel wear in that area should be better. The 5R's benefits are in the design of the rifling. for this same reason, lead buildup can cause overpressure problems. 177 cal. 1. XD barrels are hammer forged and machined with standard rifling and wont blow up, unless you overload them, then of course you could blow up a steel block There is still one reference to it on their home page: Here you can see the difference between classic Enfield rifling compared to the 5 land and 3 land polygonal rifling. If the performance increase is only marginal or they don't get along with polygonal rifling then I'll probably standardize on the 95gr SMK as my long range load. H&K has been using polygonal rifling, a regular (all sides and angles equal) polygon shape which is twisted down the length of the barrel to impart spin to the bullet, since at least the G3 (rifle) and the P9S (pistol) What the consensus of polygonal rifling? Has it been found that its more accurate or less accurate than a traditional button rifled barrel of equal quality? What about wear? Is there evidence to support that a polygonal barrel wear slower than a button rifled barrel? Does it clean up easier and foul less? Aug 06, 2012 · Polygonal Rifling is Not as Accurate. Share. Sep 06, 2008 · lead bullets and have heard polygonal does cause more leading. 5″ long and has rifle gas system and is only available with polygonal rifling. The bullet does NOT ride on top of the lands, the rifling cuts into the bullet. Jun 29, 2016 · Everything You Ever Wanted To Know About Rifle Barrels But Were Afraid To Ask Fred Feddersen is a true student of better lapping, hole boring, bullet flight and rifling. There is an angle from the center of the bore to the corner of the flat area, that is, where the flat area meets the bore. By this process, the bullet rather than taking up a spin, will simply jump over the rifling, will not be accurate due to inadequate spin imparted in the projectile, and will lead the gun Button rifling can produce a very smooth interior finish, and the majority of winning 6PPC barrels are buttoned. I've read various warnings about lead projectiles in Glocks and wondered if the same apply to H&K barrels. e. Polygonal is easier and cheaper to mass produce, and produces excellent accuracy. I shoot pretty much everything under 130gr. and even the XDm grip was large, IMO. My CW40 with conventional rifling always generated more velocity than my K40 with polygonal rifling. The hexagonal polygonal rifling meant that the projectile did not have to bite into grooves as was done with conventional rifling. May 19, 2008 · Which type of rifling is the most accurate in a . But I have not seen the polyagonal rifled barrel yet that can outshoot a good air-gauged Douglas or Shilen barrel, and that's in handguns. Trials were held in 1857 to compare Whitworth’s design against the Enfield. Ian F. Polygonal Rifled Barrel benefits include increased accuracy, reduced cleaning, increased barrel life, and increased velocity. Yes, I have fired some handguns with polyagonal rifling. If barrel leading is a concern, proper cleaning technique will solve any possible Dec 30, 2011 · 5R is different type of rifling than a Polygon. 224" 1:9" twist for the . In fact in the U. Jun 09, 2017 · How Pistol Barrel Rifling Affects Handgun Accuracy. Obviously enough to offset the supposed lower friction of the polygonal rifling. Lothar Walther Precision Tools. I've really never understood how exactly cast lead bullets wouldn't perform well on polygonal rifling. In other words some lead from the bullet sticks to the inside of the barrel when it is fired. On the up side it leaves on stress in the barrel. button rifling is quicker and leaves a great finish in the bore. Polygonal rifling generally does not use hard edges to form the rifling, but more of a wavy pattern. Usually, the polygonal barrels are a bit more expensive than traditional rifling. Polygonal rifling features more obtuse angles in comparison (think gentle rolling hills & valleys), and while this works great on jacketed or plated bullets, the relatively soft hard-cast lead bullets do not 'bite' as well on these. 45 ACP and . The barrel crown is the most obvious change. The interior of a handgun barrel isn't just a smooth tube that spits out bullets that go fast — there's a bit more to it than that, and it affects just how accurate the bullet is, the velocity and the path it takes from magazine to target. Apr 4, 2019 Stock Glock barrels use a polygonal rifling system that is actually more accurate than the average rifling system. Basically as the title says, i just learned about polygonal type rifling, and it looks like good. You can read more products details and features here. 7″) I have found that Glocks shoot just fine with lead ammo. However, the same rifling can cause a high degree of leading when not using jacketed bullets. on various boards and gun shops tell me they are not. This will lead to quicker target re-alignment and more accurate follow-up shots! This 50 Newton RSA is a direct replacement for 4” and 5” PPQ’s. 358 did way better and were more accurate. I've also read the polygonal type is more accurate, true, false. Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. HOWEVER, as stated above this is contrary to what many believe. There isn’t much difference in performance between them. Jun 10, 2016 · Why was I going off on this scientific journey? In part because of Polygonal Barrel Rifling. Oh it's "hexagonal" rifling alright, a rather elequent way of describing the typical 6 lands and grooves barrel rifling: Referred to by Glock as the GMB, or "Glock Marksman Barrel", it's nothing special or groundbreaking, but Glock sure makes it sound that way, eh?! Read more about the Gen5 here: May 16, 2011 · I need to re-barrel my Kimber 84L Mtn Ascent in 280 Ack Imp. It also creates a slightly thicker barrel as the lands and grooves, are not as deep as traditional grooves. cut rifling is more expensive, harder to produce on automated machinery, but IF DONE RIGHT can be a bit more accurate. com/differences-between-polygonal-and-conventional-rifling/ In the article I will explain the What is Polygonal Rifling anf Differences Bet Just for accuracy, the rifling used in H&Ks and Glocks are not the same. Does it mean it is not safe to shoot lead-cast bullets through it, just like the Glock bbl? Some people think that when the velocity of the bullet is high, bare lead may not engrave as well as on polygonal rifling vs conventional rifling; thus, may reduce accuracy. Whitworth developed polygonal rifling in the 1850s, and the introduction Of the McMillan M89 sniper rifle in the late 1980s revitalized the use Of polygonal rifling more than a century later. That being said, I have no complaints about my G19. I am told Black Hole Weaponry does not offer the 5 land poly rifling. The invention provides for more accurate travel of a bullet, including 22 caliber lead bullets. I will recommend to Apr 20, 2018 · A look at how the new Gen 5 Glock "Marksman" barrel fairs against a Gen 4 Polygonal barrel in both velocity and accuracy. 40cal) *Will not work with PPQ 45. Featuring the highest quality 416R stainless steel and our own polygonal rifling, the new High-End Barrels are ready to ship. They are usually cheaper to  For this reason even “shotgun handguns” typically have some kind of rifling in of polygonal rifling, at first ridiculed and now increasingly common in pistols, that Why are guns with long barrels like rifles more accurate at long range than  F. It's Black Hole weaponry barrels? 3 groove polygonal rifling If this is your first visit, be sure to check out the FAQ by clicking the link above. I have a 16" barrel on it now and would like to go to the 23. All three [methods] can make an equally accurate barrel. Ah, so polygonal rifling can be either button rifled OR CHF. Is the poly barrel a better application or should I stick with the regular rifling? Thanks, Les traditional rifling has deep grooves and are made that way for lead bullets. So that is why you can have good and bad barrels with either or all types. Another possible explanation is that there are different "species" of polygonal rifle and perhaps Glock's peculiar style of polygonal rifling may be more prone to leading than the particular styles employed in the H&K and Kahr barrels. The 5r arrangement has a land opposite a groove, whereas 4 and 6r rifling have lands opposite of lands and likewise with grooves; rifles with 4 and 6r rifling have proven plenty accurate for many years and have served hunters and military well. Polygonal rifling is a type of gun barrel rifling where the traditional sharp-edged lands and Whitworth believed that polygonal rifling could be used to create a more accurate rifled musket to replace the Pattern 1853 Enfield. Yes our barrels are prelapped/honed before rifling and finish lapped after rifling. The type of lead and the type of lube and quanity of the lube used on a lead bullet has more to do with leading than the type of rifling. More specifically, the present invention relates to rifling of gun barrels to provide a polygonal cross-sectional configuration. The twist of the rifling is measured in inches; for example, a 1 in 8 twist means that the bullet makes one 360° rotation for every eight inches of barrel length. A limited test (a few 10 round groups) might not show much, if any, advan-tage on target to this rifling system, but the advantages are there over the long run. You will get 300blackout Barrel 3 Polygonal Rifling cheap price after check the price. I have a G19 G3, PPQ M2 and a VP9. Probalby most of your advantages stated is probably more hype also. Jan 09 5 days ago Barrel - Polygonal Rifling, Smallbore, Fullbore, Extended Barrel, . With more than 10. 177 Polygonal for pellets only, & that means heaviest . The FNX . Our barrels come in two forms: cut rifled and button rifled. Actually the rifling twist will dictate the accuracy more than the type of rifling process. Walther LG300 airgun. Extended accuracy (from reduced fouling) is a big asset to the High Power shooter Polygonal and Non-Polygonal barrel pics PC3=Three Port Comp, PR=Polygonal Rifling, SA=Single which has a much better trigger, and IS accurate. The quality/condition of a traditional rifled barrel is easier to inspect visually. Conventional rifling has sharp 90-degree corners from the top of the land to the bottom of the groove. It it was more accurate and deformed the bullets less then traditional rifling, this would increase accuracy in long range shooting. This dual-patented barrel rifle technology applies a single edge area and a polygonal area separating the grooves. This rifling is one of the main reasons Glocks are extremely accurate guns. Jun 08, 2010 · The barrels are also generally more accurate because there is less bullet deformation by the "grooves" (less "bite" into the bullet) and because the bore’s surface is formed with more consistency. As to whether your barrel will be accurate with your chosen lead bullets - you'll just have to find out. The information I've found states that it helps the bullet to shoot straighter and that threre is less resistance in the barrel. Need help deciding which guns to grind for? We’ve got an in-depth look at the unique arsenal and all it has to offer, both good and bad. CMMG is advertising CHF polygonal rifled barrels BTW. Also, if polygonal bores are so much more accurate which I often hear stated, how come you do not see them showing up in all the BR guns and LR guns? You don't. I have never seen this from the cut barrel makers. It seems one of the primary reasons for poly rifling is bore life. 5" poly barrel. Bullet fitment is key no matter what type of rifling. Roughly, lead bullet shooters are more particular about rifling than jacketed CF shooters. Edit: Okay, I just finished searching for any examples of a Bar-Sto barrel that have polygonal barrels. ” The right-hand twist rate is 1:9. ? I like my Match 45acp but trying too learn more as I do with any new firearm. tngun. other newest 9mm Glock, which is a 2013 Gen 4 34, the actual polygonal rifling looks the same to me. 223 and . 's, but i'd like to get get good accuracy from heavier bullets as well. There are some advantages to having polygonal rifling. On the other hand, many shooters believe cut-rifled barrels last a bit longer. Not exactly LW poly and conventional barrels both have a 450mm twist (about 1 in 17. Bear in mind, the CW40 barrel is also . This is a discussion on Polygonal Rifled Barrels for P-Series and 320. We pay $125 more for a cut rifled blank so we charge $125 more for it. Traditional rifling uses a number of lands & grooves (L&G) which are cut into the barrel, and is the style of rifling most people are familiar with. I am not an expert, just a dumbass so don't quote any of this. 45 is a large pistol with a large grip frame. On the down side as the button is used it degrades and the sharp edges on the rifling statr to degrade. 177’s I can get at 950 or more. Polygonal rifling available in . Start studying Module 4: Firearms. H&K, CZ and Glock use a female type of polygonal rifling similar to the bore shown above right. 99 polygonal barrel, do older german-made walther p99's have polygonal rifling, early walther p 99 rifling, rifled barrel for walther ppq, walther p99 polygonal, walther p99 polygonal or conventional rifling, walther p99 polygonal rifle, walther ppk barrel rifling, walther ppk hexagonal rifling, what type of barrell does the walther p99 as have, May 17, 2010 · The well-known Heckler and Koch G3 assault rifle also has polygonal rifling (from the G3A3 model upwards), as does their PSG-1/MSG90 sniper rifle. Testing would tell but if I go with no choke . Is it easier to clean, more accurate,or last longer? Thanks Pokey. The barrels in Chrome Molybdenum steel can come with the new MRR Multiradial Rifling, where the bullets are not severely deformed as happens with traditional and polygonal rifling, and accuracy is greatly enhanced. Anyway, Still, the poly rifling sounds about my "speed" if you'll pardon the pun. Now I know companies (the ones with any sense, anyways) use different methods of storage to prevent damage to the barrel, but the longer one sits, the more likely it is you'll have a slightly less accurate or even damaged barrel or bore. They are generally smoother, take less break in, and are much easier to create more unusual rifling patterns. You can get a barrel from Lone Wolf Distributors or from other companies like KKM that will handle a hard cast bullet much better than a polygonal barrel. The grooves most commonly used in modern rifling have fairly sharp edges. Metford rifling was considered more accurate by target shooters,and the commercial military target rifles produced by BSA (the Lee Glock barrels use special polygonal rifling not found in most handguns. You will get a higher velocity out of this rifling because the polygonal rifling doesn't allow the gases to pass around the bullet like it would with the other lands and grooves. Is it me or are the grooves in a 9mm Glock 17 barrel much more shallow than other barrels from other 9mm pistols? Am I imagining this? Or are the grooves actually more shallow? If so, I'm guessing the mindset is much like with marlin using shallow grooves for less bullet deformation and hopefully better accuracy. within the P250, P320, & P320 X-5 Pistols forums, part of the SIG Sauer Pistols category; Does anyone know of any manufacturers who make polygonally rifled barrels for the P226 or the 320 (9mm mainly). Apparently, for all it's hype, polygonal rifling is not any better then traditional rifling and possibly worse for long barrel or long range accuracy. EAA advertising states Polygonal rifling however ive read. One of my favorite Energy auto rifles in the game, Prosecutor tends Nov 26, 2017 · It does apparently have a more accurate barrel, but it is still a polygonal barrel. Polygonal doesn't cut into the lead, the next shot would sweep anything left in the barrel out (as is the whole point), then also the most accurate rifle of the 19th century used polygonal rifling and cast lead bullets and had no issues other than the cost of the rifle and the ammo couldn't Aug 07, 2017 · The PM9 is significantly more expensive, but the extra cost gives you several extra features and decreased size and weight. How well the barrel is done has more effect on how well the barrel shoots than the geometry or number of riflings used. polygonal rifling does not and more of the bullet surface contacts the bore. Price is a little steep for something with no reviews yet, and I know Rainier has gotten some pretty good reviews. Big-name Texas barrel-maker still produces the lion’s share of winning short-range BR barrels. Don’t let the marketing hype fool you. Second, they generally are more accurate. These new barrels feature a series of five s egmental arcs creating a highly more accurate barrel than tradition Enfield rifling. More . Tutorials Polyagonal Rifling Sign in to follow this . A deeper grooved Ballard type barrel might be more accurate with lead bullets and the Microgroove with jacketed, but you would have to do a lot of shooting to prove either. 223 Remington using 36 and 50 grain Varmint Grenade and 40 grain Nosler BT Lead free bullets; and a . Leading is the buildup of lead in the bore that happens in nearly all firearms firing high velocity lead bullets. The specific rifling geometry of the forcing cone in Multi-radial barrels makes it possible for the chamber neck and freebore to guide the bullets into the rifling more precisely and steadily than with the traditional rifling system – the bullet matches the barrel axis in the best After reaming we employ a few other process to ensure a the most accurate barrel possible. The CM9 uses a MIM (metal-injection-molded) slide stop instead of a machined part. 3642). Or If you want to buy 300blackout Barrel 3 Polygonal Rifling. Polygonal rifling supposedly extends the life of the barrel. getting the most velocity and accuracy out of your ammunition with polygonal rifling. hexagonal and polygonal rifling seals in the gasses slightly better, as there's no 90degree crevice for gas to escape through ahead of the bullet. Barrels: Cut Rifling vs. It also allows for some cheaper  As for Faxon's button rifling, we believe it results in more accurate barrels. Nov 15, 2004 · We agree on that almost completely, but I still say if the best polygonal bore was MORE accurate than the best conventional bore then you would see a lot more polygonal bores in the high dollar LR accuracy barrels, and winning LR target barrels are conventionally rifled by an overwhelming majority. Polygonal type rifling is seen more in pistol calibers than in rifle cailbers. Nov 13, 2004 · They are accurate, sure, but they are not more accurate than conventionally rifled bores. May 17, 2018 · They do. Polygonal rifling is typically thought to be less accurate than conventional cut rifling. polygonal is every bit as accurate as cut rifling. It doesn't foul as quickly as common rifling because there are less tight corners for the crud to collect in. Mar 02, 2019 · Like Glock, a handful of other companies also use polygonal rifling. Apr 04, 2019 · Stock Glock barrels use a polygonal rifling system that is actually more accurate than the average rifling system. The British military expected to get 10,000 rounds from a barrel before replacement was required. Finally, the process used to create polygonal rifling is less likely to leave Aug 05, 2012 · https://www. Nov 30, 2014 · Does anybody have any experience with blackhole weaponry polygonal barrels? How do polygonal rifled rifle barrels compare to standard rifling? I know that some pistols have poly rifling, and it seems to do good. Polygonal barrels are easier to clean, last longer and more accuratejust don't shoot lead through them Morning olsoul I have to disagree with that statement as written--there are MANY of us Glock shooters that do shoot, & have shot lead bullets, though the polygonal barrels for years & years & years now. Sep 22, 2007 · The proof to me that cut rifling is more consistant than button rifling is the fact that quite a few button barrel makers offer different grades of barrels. ” Touted to be match-grade in quality, it features “enhanced polygonal rifling” and an “improved barrel crown. Shot my buddy's G43 over the weekend with . Polygonal rifling. For this reason even “shotgun handguns” typically have some kind of rifling in them (usual Sep 09, 2012 · My take on the subject about Glock’s polygonal rifling: The Glock factory barrel is a polygonal riffling barrel, which is supposedly more accurate with less problems with lead buildup at the neck. First, the PM9 uses a “match grade” barrel with polygonal rifling, which is said to be more accurate than the conventional rifling used in the CM9. This because of the stresses of manufacture mentioned before. 223 Wylde Review When you want huge accuracy improvements beyond a free-float handguard, the obvious upgrades are an improved trigger and target barrel, but it is the barrel which can net the biggest benefits. as for twist polygonal barrels are definitly slower twist than reg lw barrels and the slower twist rate allows pellets to be fired over longer ranges more accuratly because it allows u to increase pellet speed. Glock uses polygonal rifling instead of cut rifling because: "The GLOCK polygonal barrel rifling reduces wear and tear on the barrel and creates better bullet-to-barrel fit. Polygonal Rifled Barrels for P-Series and 320. I yanked some invalid looking claims from the polygonal rifling section. And even their new rifling is not lands and grooves, it has raised lines though it, not cuts into the bore surface. hardened more during this rifling process; this lends itself to providing longer accurate barrel life. With this post I hope to shed some light on what most people already know Polygonal rifling, “Barrel optimized for recoil reduction” -Increases stability, +10 stability Great aerial accuracy, pretty short charge time, annoying sound during   Specifically what was done to improve accuracy to meet the FBI tests. As a reference, 1 070 grams equals 2. Sure, you can find an individual polygonal bored barrel that is more accurate than an individual conventionally rifled barrel, but that is purely anecdotal, meaning nothing to the overall picture. I understand that one possible issue with polygonal rifling is that it is hard to get a good smooth bore because they are difficult to lead lap??? The barrels are also generally more accurate because there is less bullet deformation and because the bore’s surface is formed with more consistency. (9mm & . That rifling geometry will be much different than what a varmint hunter wants for his lightning 22. The lands of conventional rifling look like the cogs on a Aug 10, 2017 · The PM9 is significantly more expensive, but the extra cost gives you several extra features and decreased size and weight. The process of Single Point Cut Rifling is the most stress free way to rifle a barrel. Polygonal means, literally and mathematically, more than three sides. The Tungsten weighted guide rod recoil spring assembly is 4 times heavier than the factory polymer RSA. So, it’s like button rifling, only ten times more complicated. The invention provides for more accurate travel of a bullet, including solid copper, copper-jacketed steel core and copper-jacketed soft-core bullets. 30 Jan 11, 2011 · There are a lot more variables that go into the making of an accurate barrel than just picking the method of rifling the bore and declaring "that's the best type".  Perhaps a better argument for Feb 11, 2017 · The KKM process produces a more accurate bore diameter, cleaner surface finish and better hardness, with a more uniform rate of twist. The issue the public has is believing that old school methods will produce a more accurate barrel. add that to the way a modern pistol is held and injury may result. Because the rifling has no sharp corners to erode, gun barrels with polygonal bores have a longer useful life. That cannot be a true blanket statement - I have a Bar-Sto match-target threaded barrel on a P229R, that has land and groove rifling, purchased 2009. Store Subscriptions My Details . Later, Frank Bartlein Barrels What the consensus of polygonal rifling? Has it been found that its more accurate or less accurate than a traditional button rifled barrel of equal quality? What about wear? Is there evidence to support that a polygonal barrel wear slower than a button rifled barrel? Does it clean up easier and foul less? Glock is a famous big user of a "polygonal rifling" that is more like smoothed out lands and grooves.  As a method to rifle a barrel, its highly effective and produces good results but some argue it’s not polygonal so not as good. Hammer Forged Rifling. This produces a completely unique hybrid standard and polygonal Jul 15, 2004 · The heat effect is more intense on any exposed sharp edges and the more turbulent the flow the more heat transfer. Nov 19, 2010 · The reason glocks explode with lead is due, according to the manufacterer, to the polygonal rifling. It also allows for some cheaper manufacturing processes to be used, and those savings get passed on to the consumer. Polygonal rifling was an outgrowth of a cold-hammer forging process developed by German engineers prior to the Second World War. Maybe we should drill down to the differences and pros/cons of cut rifling versus button rifling too then . I'm not sure if polygonal rifling is supposed to be more accurate. The theory behind polygonal rifling, as I understand it, is that since the angle between the side and bottom of the groove is > 90 degrees it is easier for the bullet to obturate (seal the bore) completely. For Feddersen, it’s not just a business, it’s an obsession with building barrels that deliver single hole accuracy. 1" longer than the K40 barrel. But are there any cons, other than cost maybe, that make "regular" rifling better? Is it actually more accurate than standard rifling? Seems like with that, and the claimed extra veli=ocity, it would be a good choice for LR rifles Mar 06, 2013 · I feel a 5R style rifled barrel will be as accurate or more accurate than a polygonal rifled barrel and in extreme cases a standard type rifling will/can be more accurate than the 5R. 2. Polygonal almost sounds like more of a headache than it is worth unless all this warning stuff is blown out of proportion. I really wouldn't Polygonal Rifling has some advantages, since it has small gap between bullet and bore which leads to slightly higher velocities and smooth bore accumulates less fouling and also makes it easier to clean . Nov 30, 2015 · Why shouldn't you use lead bullets in polygonal rifled barrels? Polygonal rifling is not as deep and un-jacketed lead will more quickly foul it. both are just as accurate, but if I had my choice, I would pay the difference for polygonal rifled barrels and nickle plated barrels along with it. an un-rifled pistol usually qualifies as an “Any Other Weapon” and incurs a $5 tax stamp and a few month wait time to purchase. The resulting rifling profile consistency is excellent and the overall quality of our barrels is increased. Hammer forging produces a type of rifling called polygonal rifling. is polygonal rifling more accurate