I called a few PC shops asking about selling powder and one said yes. I got 4.5lbs in 4 different colors of what all seem to be Prismatic Powder.
My first batch of 200gr 40sw was about 75%. I heated the bullets too hot I think, around 200 degrees and several bullets clumped during tumbling. I also tumbled in a #2 plastic jug with no BBs. I'm in Northern Cali and humidity is low and it's about 90 out.
I baked these and they came out pretty good. Passed the smash test.
I then tried a different color in a large #2 protein powder tub. Swirled a bit and shook up and down, dumped on screen and baked. I didnt get 100% coverage but not that blotchy. They are 238gr SWC 454s.
Will add BBs help the initial coverage with a decent powder like Prismatic? The powder is all probably a year or more old but was zipped tied closed. I'd like to do large batches and might hit the dollar store for #5 containers OR add some BBs to the protein tub. It would be nice to bake to trays at a time.