Mauser.

No damage is caused to the cast bullet by crimping as ther is a groove on the bullet to be crimped into. The other thing I did find was that the blue wax lube left in the barrel appeared to effect the accuracy for 5-7 rounds when i went back to full power jacketted loads. This happended even after I cleaned the barrel. With the normal lube like alox or other grease lubes there is no problem. 22 grains of Trail boss is a real pussy load, but it still hurts pigs big time.