Hi
I have a new RCBS Auto-Prime, the one with the round tray for the primers. I've had a heck of a time getting the thing to work, I've had to take it apart and file on the inside of the plastic runway from the tray to the plunger, but I think I'm done with the Large Primer one at this point. The suggestion to clip the primer tray shut was a great idea. In shaking the whole thing to get the primers to drop, the tray fell out twice. The clips help immensely. Having a set of various shaped diamond files also helped immensely.
Hi again, August 6, 2016 update. The RCBS works pretty good. The primers seem to be a bit squished, but do go off.
Later