Spoke again to METL about tensile strength testing. They need 4" of the muzzle end but without choke (to save on machining cost), so unless already cut probably 6". If anyone has whacked off barrel ends, I'd like to test both pattern welded and fluid steel. It would save $ just to send what I need, but I'll want to document the maker and rough DOM.
Depending on the amount of machining time to prepare the specimen, the cost will be $50-$70.