Tumble the brass unsized, with the fired primers in place. Next step is to size the and deprime the clean cases. Clean cases are easier to size and the depriming will take care of any pesky hole cloggers.
After many years of trying stuff that's not made for case polishing I can tell you the treated shell media sold by Midway USA is the best value.
Pet bedding materials are usually not the correct size. The treated shell polishes and lasts a long time. Corn cobb is softer and doesn't polish like the treated nut shell.
You can get the nutshell lizard stuff but it's not treated....now you have to buy additives and the proper additives ( Rooster Labs polishing additives) is expensive...it eats up your savings...just get the stuff from Midway USA...much better deal than DIY with lizard litter.
Gary
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