I've been fine tuning my sub-sonic 147 grain 9mm loading and encountered a problem I knew about but hadn't given any thought. Those bullets have a sharp full diameter heel which I discovered to my dismay caused a significant case bulge on some brands of brass. I guess I'd just lucked out with the initial loads using a handful of cases from a coffee can of mixed brass.
I only had to pull 20 or so bullets because the loads wouldn't chamber. I had to dig through the brass stash for a can of Federal brass as that brand is the only stuff that doesn't swell too much when 147 grain bullets are seated to fit MagPul magazines. On the plus side, I did stumble onto several hundred 147 grain cast lead bullets I forgot I had. At 950-1000 fps, those may provide cheap practice loads once the bore gets smoothed up a bit.
I only had to pull 20 or so bullets because the loads wouldn't chamber. I had to dig through the brass stash for a can of Federal brass as that brand is the only stuff that doesn't swell too much when 147 grain bullets are seated to fit MagPul magazines. On the plus side, I did stumble onto several hundred 147 grain cast lead bullets I forgot I had. At 950-1000 fps, those may provide cheap practice loads once the bore gets smoothed up a bit.