I'm kindof agreeing with wil terry and would reiterate the questions asked by chris, there should be no reason that a casing would expand that much out of any 9mm chamber. I have been with a friend who rented a 40 cal and the range gave him 9mm ammo for it, much of his brass looked like that but never failed to fire and with the exception of crappy accuracy he had no idea that anything was wrong until I pointed out his brass. you may have just gotten the same stall as someone that had made that very same mistake. and didn't do a good job cleaning up his brass.
all guns lost in a tragic smelting accident.
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