Where have you heard?? Probably on the internet and probably none of that was from personnel experiences either. Everyone says dont use steel case ammo, it will tear up your gun. I have never seen anyone say it tore up there gun...always a friend of a cousin of a guy I knew.....

I have personally shot thousands of rounds of steel cased 223, 45acp, and 9mm and have had ZERO gum breakages due to ammo. I have had the occasional stoppage, but I have had the same with any other ammo as well.

Buy it, shoot it, and enjoy.

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Nothing to see here,move along