I am assuming you keep separate toolheads for your 550 with their own powder drops and with the dies always in place, and when you change calibers, you simply pull the pins securing the toolhead and swap in the toolhead for the caliber you want to load for?
I have the toolhead the machine came with. That's it. When I switch calibers, I unscrew all the dies from the toolhead and put them away, then screw in the dies for the new caliber and set them up. It's a bit of a pain, but no big deal.