Imperial sizing wax/paste/or whatever you wish to call it for bottlenect rifle brass. I then run the cases thru a quick bath of gas to remove the Imperial, then tunble AFTER the gas evaporates.
For pistol cases using a carbide die, I spray them lightly with Blaster Teflon spray, resize then tumble. I know there is no need to lube pistol cases but doing so makes life easier. And I'm all for easy.
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