I've loaded about 2K of these now.  They seem to work fine in my Shadow 2, PDP, and Open guns.  However, they are a total pain in the butt to flip on the primer tray, and my RL1100 primer feed system does not like them at all.  They are constantly causing stoppages, especially if I try picking up the pace, even a little bit.  Just for kicks, I loaded 100 with CCI primers and it was night and day as far as the press goes.  No stoppages and I could go as fast as I was able to pull the handle.