I set up my 550 and started loading some .45 for necks shootem-up sat and thought I would see how long it took me to load 100 rounds. Well it took me 13:15 to load 100. That's a load rate of 452.8/hr. Guess it's kinda fitting for the .45. This is still looking at every case for powder. I thought I was kicking it and still didn't reach the supposed abiltly of the press (550). I do love loading for .45 b/c I don't have to pull each case off to see if there's powder in it like I do with .38spl. I need to get me one of those lights that shines through the middle hole in the shell plate. That might help with the .38's.