Was at the range today and while scrounging in the MT brass bin I came across these. I have no idea how this could happen. If you look closely you can see the brass is bulged on just one side. There were around a dozen cases all shaped exactly the same. They are 9mm. Any ideas? I included a normal 9mm case to compare.
With a 38 case to compare.
With a 38 case to compare.


















































