NavajoNPaleFace
I've primarily been using a load of Federal match primers, but I also used some "regular" Winchesters for fouling rounds and had the same problem. Thanks anyway, but it was the primer pockets, not the primers.
I got my RCBS die yesterday, but haven't had a chance to use it yet. However, it looks to be very well-made, and I look forward to trying it out.