I believe you are using the Lee Collet Crimp die, not the \”post crimp sizing die\”. The collet crimp die squeezes the case neck and the \”carbide\” FCD (for handgun calibers) uses a regular taper or roll crimp and the as the case is extracted, the carbide ring removes any bulges and insures the cartridge is in factory specs. Never heard of any problems or complaints about the collet crimp dies. I use 3 of Lee\’s collet crimp, 2 handgun and 1 rifle and the only \”carbide crimp die\” I owned now resides in a landfill somewhere in southern Oregon…