I have a shorty SRH in 454 casull and have question about it's ability to take heavy loads. I know it is a very stout gun and is meant to take a beating but after feeding it a couple 370 g WNFP GC Alaskan Backpackers the bullets jumped crimp and the chamber locked up. It's obvious the bullet was meant for an FA or something that could tame the recoil a little better but will it harm the pistol? I am going to the range tomorrow to shoot the rest of them and thought I might hold off or just buy some lighter loads if I risk ruining my gun. Any advice on a max weight bullet for this caliber for bear defense?