If I was in CDS' position and was absolutely committed to using the powder check die (not a bad thing--not my particular choice, but whatever), I would consider a combination seat and crimp die:

(1) Deprime/resize/prime
(2) Expand/Charge
(3) Powder check
(4) Seat+Crimp

And then really, really make the effort to convert over to on-press priming. I agree, it was hard at first. I even spent a long time feeding small primers by hand. But with a little tweaking and the right technique, I don't drop primers anymore. At all.