To be totally honest here, there's no way in hell that I'd tumble any rimfire ammo. The idea of the case rims bumping and buzzing around against each other makes me really uncomfortable. I do tumble loaded centerfire ammo, and always have without any incidents at all. As for stripping the wax bullet lube from the bullets, please remember that rimfire ammo is externally lubricated and that lube serves a real purpose as far as feeding and leading control go. If you must remove the bullet lube, the only safe way I can see is to wipe them down individually, one at a time.