To each his own, but that case damage is the reason I sold for a song the only Lee FCD that I ever owned. I do not like brass that has been damaged in factory ammo or a FCD. Or for that matter brass damaged by the slam bang action of some semi auto rifles. I usually can look at a extractor rim on a rifle cartridge and tell if it has been jerked violently out of a gas operated arm. Very often such cases will not fit into a Forster case length/headspace gage because of rim damage. They also give false reading on calipers and also do not seat to the correct depth of the seating die, seating slightly shorter than the established depth setting. Also they will change the cutting length on a case trimmer slightly. Full length sizing does not change this either. my experience anyway, james