Dumb question on hot ammo

my lugers are shooting excellent with magtech-9a-ammo. the bullet has 115 gr., a light one, and the load is not so hard. be careful with heavy bullets and hard loads. the pressure will be too high for the luger. in the 1960th a friend shot such a heavy bullet (nato-ammo) and destroyed a wonderful dwm in a perfect condition. the firing-pin-lock (hope that's right) broke the firing-pin-chamber. now he has a mismatched sparepart in it.