And then only less than a thousandth of an inch at a time.
A good palm thump should be able to move it if it's working normally.
I put them together with the retainers tightened and palm thump it while the pads are still backed off.
If it moves, great and done (well besides pumping the brakes back up before it's driven) :D
Also the anti seize on the slide surfaces is widely accepted.