I cut open a couple pieces of brass that bulged in my Lone Wolf barrel, to see where the bulge happened relative to the web of the case. This is a newer barrel, bought in December 2011. I thought the picture was interesting enough to post here. This is a 40 S&W case, didn't have any bulged 10mm handy, but the internal dimensions on the 10 and 40 are pretty much the same other than the primer pocket. Wanna kill these ads? We can help!