I don't recommend going from scrounged brass to a finished cartridge one time around the progressive. Progressives can be very efficient, but there's still a distinction between brass preparation and loading.
Brass prep can involve lubing and decapping, after which it's sensible to clean the brass. I agree that many successful people forgo both, but leaving dirty primer pockets and lube all over the case goes against my sensibilities, as does not lubricating brass even for sizing with carbide dies.
Brass prep could be done with as few as one full-length sizing die, but there are reasons to use more in some cases. You can use a universal decapper in the station with the primer catcher. You can neck size independent of body sizing using a Redding neck sizer or a Lee Collet Die and then the respective body die to bump the shoulder. With a handgun cartridge you might have an additional step to expand the case mouth -- and yes, you can neck and body size handgun cartridges independently and it makes sense to do so because there's no reason to squeeze the body down with the carbide ring that's small enough to give neck tension on the bullet. So there's the potential to use at least as many as four die stations just for brass prep.
The Loadmaster has a larger diameter ram. I can tell you that the Lee Auto Breech Lock Pro has a small ram and it's only under the first die station. The other die stations are offset and they're no good for sizing the bodies of rifle brass -- they bind -- but maybe people don't expect to do much rifle on the ABLP though it does fit AR-size cartridges. My point is that in some cases, one die station is better for an operation than another. I know one champion F class shooter that reloads on a Dillon 750 and he'll use the same die station and the same shell plate slot for seating (when he's not using an arbor press), just for consistency's sake.
Once the brass comes off the press, it can be washed and primed. I store mine after that.
To load, I start with a powder drop, then an RCBS lock-out die. Then the seater, and finally the crimp. That's another 4 stations. I'm sure other people can come up with uses for even more stations especially for brass prep, trimming and all, but that's not my point.
My point is that it makes sense to separate brass prep from loading, even if you do all the brass prep with one station. Use the case feeder and the progressive is still faster than a single stage. Loading progressively uses at least two stations for powder and seating but it often makes sense to add a powder-check and a separate crimp.
So there's no reason to worry about using a progressive press even with only one die.
