Very interesting history and good info! Thanks guys. The 8x64 idea is an interesting one that I will check into when my Cerrosafe arrives. It does look however though that the "4" is much fainter and quite likely over stamped by the "60". Is it not possible to have a .323 groove with 7.8mm bore? Would an "S" be covered by scope mount, or have been on the receiver? Every measurement I do on the slug and the muzzle shows .323 give or take .001. Will do one on chamber cast also. So, what type of receiver and stock might have been used on such a rifle originally? Thanks again!