CZ-24, VZ-24, Argentine 1909, Persians made at BRNO in the Czeck Republic in the 30' s are all good bets, but most Mausers (not all) will stand up to all but the biggest bruising magnums. If you are building something monstrous I' d talk to several experts. If you are building from .300 Win mag on down it probably won' t make a big difference unless you plan on putting an amazing # of rounds thru it.