I shoot tons of that bulk stuff, I seem to have better luck with the Federal, the Remmy stuff does misfire more than anything else. I just eject it and put it in the next mag-full, and it always goes on the second try. It's not the gun, the firing pin imprints is nasty, I guess it's just that the priming compound isn't distributed evenly inside. It is aggrevating, regardless. I also tried the new Federal Auto-Match, couldn't tell any difference in my guns.
PJ