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Man, they must really pound that barrel hard and for a long time to get it a third longer. It must relieve a lot of the stress from that piece of steel, just as the guy from Beretta/Sako/Tikka explained. He also said they reheat it afterwards for a couple of hours to finish the stress release process. Did they say if that was a cold hammer process? Are they all cold hammered?
Pounding the heck out of a piece of steel DOES NOT relieve the stress but instead added the stress - good kind of stress. Yes, it’s cold hammer forged because hot hammer forge doesn’t put that kind of good mechanical stress to the steel.

Of course once it’s heat treated, that stress goes away, so that claim of hammer forging is better than button broached rifling or cut rifling is full of you know what. It’s called good advertisement.
 
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