Thread: Cold hammer forged barrels in ar-15s...?

Quote: It may not make a difference in practical terms, but "in theory" there is a benefit to having harder steel under the chrome. I agree there is likely no practical difference. The difference among non chrome lined barrels is not that great. I assume the difference once plated would be even less.

Well Daniel defense and bcm offer cold hammer forged barrels that are chrome lined as well.

they will last longer,and cost more . check out the new BCM cold hammer forged uppers .

Correct, it's main advantage is longevity, as long as you don't pay a bunch of extra money for it than it may be worth it to some. In the case of the Spikes upper deal of the month I feel like it is a good deal because it is not an outrageous price. "87gr" on ar15.com got a T&E spikes CHF sent to him and did a range report on it back in Sept. and was impressed with the quality and function and called it a...

Not necessarily. A "mil-spec" barrel is going to be hard chrome lined, which is much harder and longer lasting than a hammer forged barrel. The real "military specification" calls for a barrel to be chrome lined. Truth is, a hammer forged barrel "can" have a number of benefits, but simply because its hammer forged is no guarantee the barrel is any better than any other. If you have a Colt...

As I understand it, for high volume production, hammer-forgings are very economical when you are making very large runs of barrels which have to hold tight tolerance (and thus shoot a bit more accurately than an inexpensive hunting rifle. Seems like a good way to go for common AR-15 barrel configurations.... -tINY

All I can say is that my BCM upper is astonishingly accurate. Whether the cold hammer forging has anything to do with it or not, I'd have absolutely no hesitation about buying another one.

http://technology.calumet.purdue.edu...20No_%207).htm Interesting article with pics about hammer forged barrels. From Precision Shooting magazine, November 2005. "About the Authors Vern Briggs is the Forging Process Engineer at Sturm, Ruger & Company, Newport, New Hampshire where he is responsible for barrel production. James Higley is a Professor of Mechanical Engineering Technology at Purdue University Calumet, Hammond,...

Horseman, The harder the surface under the chrome lining the less ductile it will be. That means it will deform less before breaking. Chrome can "flake off" if the suface it is bonded to deforms too much, as chrome is especially hard and brittle. It may not make a difference in practical terms, but "in theory" there is a benefit to having harder steel under the chrome. Jimro