This part of reloading used to be mindless; toss the fired brass in the tumbler and let it go.
Over the years I have used different major brand media with satisfactory results.  Used to be ground walnut shells with a mixture of rouge.  Someone made a "re-conditioner" that was rouge in a light liquid; always worked great; no longer around.
Sometime ago, I replenished my supply with a common brand of ground corn cobs with a green polishing agent. Used that for long time, but the last batch was so dusty with the polishing agent the cases had to be cleaned after cleaning.     Tried to eliminate the "over dose of polishing agent" but to no avail.  I contacted the well know maker and never received a response.
Next, tried a current, major brand of treated, ground walnut shells.  Same results; lots of dust but poor cleaning.
I use a vibratory cleaner.  Nothing exotic.  Using smokeless powder.  I use a wet tumbler for the nasty, dirty cases.
I have no interest in making my own, as this should be a no-brainer to purchase.
Anyone having a good experience with one brand or another?

Thanks, and Merry Christmas 

Mike.

I bought a 25 lb pail of walnut shell media at Harbor Freight for $28 and it seems to work just fine for me. They have two grit sizes to choose from. I got the coarser of the two.

If you end up with super dusty corncob or walnut shell, cut up dryer fabric softener sheets (Bounce or whatever) into thin strips, and put a couple in the bowl.  They’ll eliminate the static so it doesn’t stick to the brass.  Another helpful hint is to add a couple tablespoons of mineral spirits to the media.  Both will turn dusty pet store media into usable tumbling media.   

If you buy the treated media, and it has too much coating on it, just mix it 50/50 with untreated media.

I tossed some out one time onto an old window screen. When i looked at it in the spring it looked like new. Probably should of looked at it sooner, but looks like washing it off does not hurt it al all

THE BEST:   Turtle Wax Chrome Polish!