Thanks Calhoun, I think that's where I'm going to have to go. I was (CAREFULLY!) able to insert a .308 round into the chamber and it appears to fit, but definitely too long to fit into the rotary chamber. I seems highly unlikely that someone would rebarrel a 99 into .308 (on a 1949 action) when a .308 cartridge would not fit into the magazine! Cerrosafe chamber mold by a gunsmith it is! Thanks all for your input!
