I use a Lee hand primer, the old round tray variety...works great, but I saw the Lee Ergo Prime at the lgs, and I couldn't resist. After a week of use, I went back to the old Lee priming tool. The old style drops primers straight onto the ram, the new one basically has a tiny elevator that moves a primer up into the ram area between seating operations...every so often two primers get jammed onto the elevator thing and pop the cover off the tray. I like the handle of the ergo better, but it's not enough to make me want to permanently switch. Only priming I do on press is with my LNL progressive.