I use the old style round ones. Must have about 10. The newer square ones don't seem to work as well though. Have a couple of the RCBS bench mounts one I've never used. Going to keep on using the older one for large rifle primers. I use the large old Lee hand held for serious loads in pistol. (bear loads etc) The majority get seated on my Dillon machines. As for the bear loads..I'm gonna stay away from Bear country I think.