Tumbler, or vibratory?
I own both, for a vibrating I have a big blue Dillon CV2001 and I use lizard bedding which is pretty inexpensive and dust free.
For my tumbler I have a Thumlers tumbler (Rock Polisher)use ceramic media and a cleaning solution. I only use the ceramic media for my BPCRs (.40-70, 45-90, and .45-100) because the media I have will bridge in a small caliber case neck. This stuff is very aggressive and will clean case necks and primer pockets like new. You can get smaller sized media, but I’ve found the vibrating cleaner works fine for smokeless.
I use a standard household "timer" the kind you get for lights etc and usually run the vibratory cleaner for about 2 hrs and the tumbler for 30 minutes.
Chuck