Cold hammer forged barrels are beaten into shape with a hydraulic hammer that applies even compression to all sides of the barrel blank. More important than the method of manufacture though, is the finishing process. This process aligns the grain of the steel in one direction, strengthening the material through this seemingly abusive process. 20,000 rounds to key-holing for rifling vs 30,000 w/ polygonal. e.g. This Criterion barrel review pits one of our chrome lined match grade barrels against a similarly priced cold hammer forged competitor. This process, while slightly more expensive than a normal forging, aligns the grain structure of the metal, while compressing it for strength. Nitriding barrels provides a massive gain in corrosion resistance, but no process is 100% rust-proof. What About Stainless Steel?Stainless steel can be easily nitrided, but it is very difficult to add chrome to stainless steel. ... if not all, current model Sig handgun barrels (as best anyone can tell because Sig ain't' talkin' much) are hammer forged steel (not stainless). They come in a variety of gas systems, profiles, and twists. A little oil doesn’t hurt, either. Re: cold rotary hammer forged vs. cut rifled? Faxon always recommends the barrel is cleaned and dried as needed. A simple magnetic test suggests P365's barrel is a chrome-moly steel, but then some grades on stainless are magnetic. Forged steel items are hammered or forcefully manipulated in place. These barrels are created by a process where a mandrel with the reverse imprint of the rifling is pushed into the barrel blank and the cold steel is then beat by a hammer assembly to impart the rifling into the steel. The PSA Stainless Steel Cold Hammer Forged Barrel PSA Also makes the PSA Cold Hammer Forged Stainless steel barrel, which comes in a Matte Stainless Steel Finish, and are made out of 410 Stainless Steel. Stainless steel barrels have been part of the gun culture for decades (since the 1930s, to be specific). Well made there is no difference if a barrel blank is hammer forged, cut or buttoned but a hammer forged barrel blank can be made within much lower tolerances and so the custom gunsmith safe a lot of lapping and calibrating time. Stainless steel is another common barrel material choice among rifle owners. Like carbon fiber, it also has its pros and cons, including the following: Pros. These barrels are chambered in 5.56mm NATO. This one is pretty easy. Thread Tools: Show Printable Version. is the sig p365 stainless steel, p365 barrel material, sig p365 barrel material, sig p365 hammer forged, sig sauer 365 cold hammer forged barrel, sig stainless steel slide composition, slide material in sig 365. Cold Hammer Forged vs. Mil-Spec. The cold hammer forging process work hardens the steel around a rifled mandrel, which creates the lands and grooves. Here ya go: Hammer Forged Barrels by Vern Briggs and James Higley Preface Many shooters don’t realize that barrels have always been hard to obtain, even in peacetime, due to a national and worldwide shortage of barrel-making capacity. Click on a term to search for related topics. Cold Hammer Forged: Final point of discussion: CHF barrels. Our chrome lined barrels are cold hammer forged and made with the material callouts and manufacturing process for the M249 Machine Gun barrel. Hammer forging is the most economical way to make a barrel these days. 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