I've tried dry tumble, dump in a basket and bake method and have not been satisfied with bullets sticking together. I've also used the dry tumble and stand each bullet on its base and I like the results best with this method but it's a pain standing each bullet up in a neat orderly fashion. I've found a faster method that provides the results I want and is much easier that I thought I would share with the group here.
I've used plastic trays, retrieved from dumpster diving at the range and screwed them, using 2 screws per tray, to a piece of 3/4" plywood which is the same size as an aluminum baking sheet that fits my toaster over (10" X 12").
Shake the bullets in a #5 dish, without BBs until coated. Pick each bullet out and drop it nose first into each hole.
When all holes are filled place the aluminum plate over the bullet filled trays.
Hold both top and bottom together firmly and flip over. Lift plywood and trays straight up to leave bullets standing nose up on the non stick foil covered aluminum plate.
Insert plate into oven and bake as usual. It takes me 20 minutes to fill 360 holes with bullets. By the time the batch in the oven is done baking the next tray is filled and ready to bake.