I already had one of the RCBS swaging die sets so I tried it in a single stage press. It still left the cases hard to prime, and is way too slow. Next I tried the Dillon swaging tool. The resulting cases primed OK w/CCI primers, but they were hard to prime with Wolf primers. The Dillon tool is faster than the RCBS swaging die, but still too slow. I ended up buying a Weldon Countersink bit like this for about $20: I chucked it up into my drill press and swung the table out of the way. To remove the crimp, I just touch the primer pocket onto the bottom of the spinning bit. You get a feel for it and end up removing much less material than in the photos above. It's also about 4 times faster than any other method I've tried.