Perhaps, but it depends on the customer. A crackhead who wants a gat probably won't even know what ammo to load in it. (Apparently it's somewhat common for police to arrest street criminals with a gun loaded full of the wrong caliber ammunition). And unless you seriously overpack the round or make the barrel out of pot metal, more likely the quality problem that you will get is the gun failing to fire or failing to cycle. Remember though, you are talking about criminals, not people like you and me who care about safety ratings.