I second what fiver said. I have two 550s sitting side by side, one pretty much stays on .45 ACP all the time, although I
occasionally make a run of .308, .44 Mag or other large primer stuff which I need a bunch of a standard load. The other
one is for the small primer stuff. But there is a Redding turret sitting right there that may get more actual hours on it
over a year doing small batches of experimental stuff. Once I have settled on a load, then I run a batch of hundreds to
thousands on the Dillons. Still gotta have a single stage, although the turret is nice, real nice.
That said, I do not resize stuff before it goes to the Dillons, they just run cases, although
trimming rifle has to be done in advance.
Bill