The Lee Auto Primer with shell holder set includes 11 popular-size shell holders made to fit more than 115 cartridges. This is the fastest, most accurate priming tool made. You never touch the primers from the box to the shell. Automatically feeds and installs primers just as fast as you can place shells in the holder. Each primer is perfectly seated with the feel appreciated by precision reloaders. Easy to load. Built-in primer flipper turns them right side up. Includes large and small trays.
I just started using my new Lee Auto Prime. I have one of the older ones with the round primer tray that has worked great for over twenty years. I ordered this one so that my son and I could both be priming at the same time. This new one is much harder to use that the old ones with the round tray. Primers don't turn over as readily as the older one. The cover on the tray is hard to secure. I don't like the way the primers transfer from the tray to the seating ram, they are loose and can be knocked out easily. I'm going to watch the yard sales and try to find one of the older ones in good condition.
I have used Lee hand priming tools for years with overall, good results. This model is more comfortable to use than the older version, but certainly no faster, if as fast. The square holder works very well, (better than the older round model) and uses the same shell holders as the older models which is a help. It takes little effort to learn the "feel" of the tool, and I would certainly recommend it and a good tool, and a good buy.