Elvis Ammo's video about pre warming bullets before tumbling also works very well. He puts his in the oven for a bit, i just set my tray of bullets on top of the oven. I have tumbled with and without the airsoft BB's and i am convinced the that BB's give a much more even coating. I merely tinker with PC occasionally. Works fine at my normal charges and velocities for my riffles, however it working in my pistols still needs more tinkering. The PC changing the seating depth of my riffle bullets drives me bonkers, but accuracy was still there.
I make the financial Head Mistress pink bullets to soften her grip on the change purse. Working on her Lavender Scented bullet lube, she's on a mission to fill the gun range flowery smells. Not sure if it will work, but it got me the 80 bucks i need from her.