Re: Federal Brass
First - go through your brass and find anything that says A-MERC, crush it so some other poor slob don't get it, and toss it. You'll feel better. That is, without a doubt, the worst brass on the planet.
Now - what caliber?
I've noticed, with FC 32ACP, when you bell it you get a bulge. I've seen the same thing with Speer nickel (but not brass) 32s. The best I can come up with, with the federal, is the inside of the case has a little ledge in there, for the bullet to sit on. This causes the belling die to bulge the case. When I load 32s, now, if it's a nickel case I just toss it in the scrap bucket. If it bulges, I look at the head as I toss it, and 99% of the time it says FC.
I have not had problems with other Federal cases. Just 32.
Meddle not in the affairs of dragons, for thou art crunchy, and taste good with catsup - George of Lod, Year of Our Lord 297
I always take precautions.
Beware the Evil Bullet Fairies.