I'm thinking mostly about thick military or foreign 9mm brass as I type this, but also other calibers. I size my 9mm boolits to .358 mostly, and in thicker brass they leave more of a bulge. The bulge rarely seems to cause a problem, so maybe I'm being silly.
I can afford to be picky, since I have quite a bit of range brass that I've picked up over the years and I don't shoot a whole lot. In short, I've got way more brass than I'll ever use. I usually just pick out the US stuff (RP, WIN, FC, etc) and set the foreign and military brass aside. I have bags full of PMC, S&B, and whatever else that I'll never use.
Anyone else do this, or am I just being way too picky?