I managed to snag a 7.62x39 barrel for a Savage rifle. I'm planning on putting it on a cheap-o 'stevens' short action rifle, which I do not yet have. I have 2 choices of bolt-faces - the .223 (.375") & the 22-250/308 (.473") family. Neither perfectly matches the 7.62x39 (.445"), although I suspect the 308 family will work. Can anyone confirm?