I use the silicone dry tumbling method (in short, spray the bullets with silicone spray, add a teaspoon of powder and shake, then pour on a mesh and bake).
https://www.youtube.com/watch?v=Tf5C7x27Gmg
I am constantly trying to improve my results. I do about 20 lbs of bullets on one plate.
For big bullets like 350-500 grains I find that 25 minutes on 400 degrees will get all bullets with an even coat that is perfectly cured and withstands all tests and trials.
If I do the same to small bullets like 9mm, I will have one solid clump of glued together bullets. If I lower to 20 minutes I get almost no clumping, but will sometimes get flakes, meaning the coating is under cured. Raising the time to 21-22 minutes increases the risk of clumping.
Has anyone gotten satisfactory results with large piles of bullets in one baking? How do you find your sweet spot? Are you using different times and temps depending on bullet weight?
Answers like "less bollits", "stand them up" or other non constructive advises on the topic in question are friendly but firmly advised to some other threads, this is about volume baking.