I use the RCBS bench priming tool for priming larger amounts of brass. When I only need 20 or 30 for load development, I use the RCBS universal hand priming tool. The bench model requires loading the primer tubes which is a little tedious. The universal hand model you can put however many primers you need in the tray. No problems with either one.I need a new priming tool, my Lee tool with tray has broken. The consensus seems to be for Sinclair, 21st Century and K&M. However, these seem to require handling each individual primer with my fingers, which to me seems slow and cumbersome. I use an old Bonanza Co-Ax, so I would just prime with that if I wanted to pick up every individual primer by hand. Does anyone make a good priming tool with a tray or something to feed 50 primers at a time?