The Loadmaster was not designed to perform as you wish. If you decap at station 1 then fill with powder at 2 the powder will trickle out of the primer hole on the way to 3.
I reccomend you use whichever brand /style loader as they were designed to be used at least untill you get a few miles under your belt. I use the loadmaster but rather than performing additional operations I oft times use the case loader to speed the process but actualy use 2 or 3 passes in performance of the overall operation.
1st pass to deprime and size prior to cleaning. 2nd pass to prime although most times I hand prime while watching TV. 3rd pass for powder bullet seating and crimp.
Priming can be problematic and in the long run I find the overall process is faster and more reliable when performed in multiple passes.