A. Lee dies suck.

B. You are probably over-flaring the case mouths. You should barely be able to see the flare.

RCBS and Hornady dies are lightyears ahead of Lee with one exception. I use a Lee factory crimp die at the last station of my progressive reloader. It has a carbide ring that goes down all the way to the base of the cartridge, and in addition to cleaning up any bulge that might have occured during the reloading process, it gets rid of even the nastiest "Glock bulge" and makes the loaded round perfect. You can shoot the nastiest range brass you can find in the tightest of match chambers this way. I don't even test my loaded rounds in a chamber guage anymore.