I've heard rumors from some people I work with (I'm a firearms instructor) the the 357sig was cracking the frames of the weapons that were being used to fire it. I was told about 20k rnds and the frames were cracking. Even the Sig Sauer which was DESIGNED to take that round. I find this hard to believe that the round is destroying the weapons. Has anyone else heard this? Personally I shoot .40 out of my Sig and I shoot my revolvers but I'm going to be getting another Sig in a couple months and have been debating between another .40 or .357 Thanks for any advice you might have.