In theory, it's possible on a Super 1050 (not the older RL1050, which doesn't have the height below the toolhead to load medium or larger rifle cartridges). You can float dies on that press using o-rings.
Here's the thing - and why I'm not doing it on my own. You still have to run it as two passes (Dillon's on-press case trimmer uses a Dillon made size die as part of it's operation - a FL non-bushing die), so you're still going to size the brass... and then nothing else, until you trim and finish prepping brass, and remove the lube. If you use a mandrel to expand necks, you can obviously do both on the first pass, with the mandrel in pretty much any other station. The one big rule is that you need to decap on station 1 - after that, you could size and expand in 5 of the remaining 6 stations.
Then you switch toolheads (which isn't super quick on the 1050, unlike the 550 or 650). The brass would need to move past 2 empty stations to be primed (the priming on the 1050 is superb, though, if you're using fairly consistent brass - you don't feel it, but you can set the depth mechanically, and if your primer pockets are fairly uniform, your primer seating is very consistent). Then you can drop powder into the case and seat on any of the remaining 4 stations.
That's $400 in toolheads alone. That more than paid for my single stage press and then some. It almost pays for the 550 set up, even.
Where the 1050 would shine, though, I think, is in loading "just needs to be accurate enough" .223 trainer ammo, and things like that. Loading rifle ammo, as the press is intended to be used (with the Dillon powder measure), you should be able to load 800 rounds per hour (Dillon says 1000-2000 - loading .38 Super racegun ammo for USPSA, I never got above 1200, but that load used N105 and was a very full case - if I rushed, I'd sling powder all over the press).
I considered nabbing a 550 for precision rifle, and I'm sure it would do an excellent job when set up correctly. I didn't have space on my bench for the bigger press, and I kind of wanted to have a go at it with a single stage first, so I that's the way I went ;-)
