jimmyraythomason
Member
It is in fact a 1:10 twist as per the cleaning rod/patch method. I haven't had the barrel slugged but a .257 bullet enters from the muzzle to just shy of the cartridge case mouth. I bought the barrel off Gunbroker.com unmarked but sold as a .257 bob barrel. I sent the barrel,receiver and stripped bolt to my smith for installation. I don't know if he verified it as a .257 barrel before installing and chambering it. He also cut a new crown. The crown looks perfectly centered.