I was reading Rangefinders thread on using a tumbler, and I have a extra tumbler container so. I put 60 500gr 45 boolits in and put 1 tbl spoon of Harbor Freight yellow powder in and NO solvent then turned it on. It coated the boolits great and it stayed on while I set them up. They are now baking and look great will post picture tomorrow as it is late now.
I used ONLY powder NO solvent and it covered great and even. YEMV but I have been PC ing dry for a while now with no problems. I have pushed a 200gr PC boolit no GC to 2500fps accuracy was as good as lubed and FPS was much higher . Hope this helps! and I had 1/2 tbl spoon powder left!