I have some red and blue Eastman powders but could never get any decent results using the "Shake bullets and powder in a #5 tub" method - so, because I stumbled across a Franklin Armory vibratory case-cleaner that I thought I'd lost, I decided to try and vibrate the bullets instead.
What a difference! Unlike the old blotchy, badly-coated bullets I was getting before, these are now very usable indeed and compare very well to commercially-coated Hitek bullets that I'd bought about a year ago as an experiment. I can't get a great photo in this light, but here's powdercoat vs Hitek:
