I have a rock chucker but found I can do all my rifle on my 550 in a two stage process. I'm not a big volume loader. With .223 I First deprime and size, if they are dirty I tumble first, then off to the tumbler. They next go thru the lyman trimmer and case prep station. Back to the 550 for powder, bullet and crimp. For my bigger rifle, I powder by hand (because I don't have the powder setup for .308, 30/06, 8mm mauser) yet. Lotsa Zen time