I have well over 1000 rounds through mine with several types and brands of Ammo with NO I mean 0 issues! Now that being said two days ago the hold down bolt snapped in half while firing it. The slide fell off and the bolt came out. There was no damage but I am not happy about the bolt braking in half for no reason. S&W sent me a new one already. But why did it break? It was not over tightened and it did not sheer off. It looked to be over hardened. S&W did not seem to be surprised by it?