Gunner,
A friend brought me his Walther P-22. Said it won't reliably fire cheap bucket-o-bullets rounds.
It won't.
I have never worked on a P-22, but it looks like it's got a boss on the firing pin to prevent the pin from penetrating the rim of the cartridge. On cheap, thin rounds, it looks like the boss is striking the breech before the pin penetrates far enough to pop the primer.
Question: Can I grind off four or five thou from that boss without otherwise harming the purpose of it? Or is it so critically adjusted for length that any change will end up perforating rims?
Thanks,
LLoyd