I have a 1923/30 Mauser C96 with NEW recoil spring and a good bolt stop....worn but good. Rifling worn but visible.
The 7.63 mauser shoots good but keyholes (muzzle test swallows bullet).
I have several cases of the 7.62, but you're saying don't shoot it?
I'm hoping, of course to be able to shoot it but will NOT if I absolutely shouldn't.
TIA...