I never thought it could happen, but I had a total case head seperation while firing my .40 S & W P99 this morning. I am not hurt, shaken up a bit, but the gun is trashed. I figure the gun saved my butt (actually my face and hands). On the Walther, the extractor is broken with a spring protruding from it and the frame is badly cracked. I found the case head about 10 feet away, the body of the case is still in the chamber. I have contacted both Walther USA and the cartridge company by e-mail. I was firing "guaranteed remanufactured ammo" from a company here in Texas. God, I hate that this happened.