These tiny balls

[Kurt]

Sure do a fine job cleaning cases.
Just recently I got cheap 10 liter ultrasonic to cleaner from Amazon to clean carburetors and injectors and I been using this combination also for cleaning brass.
When I get home I deprime and soak the brass in some water for about an hour to soften the fouling and then put the cases in the ultrasonic for an hour with one pellet of Cascade dishwasher stuff and then run them in the tumbler for a halve hour or less with the cascade and they come pout looking newer than new
Just using the ultrasound gets them clean but not bright like you see them below. Those little 3mm ceramic balls polish the brass like you would using Brasso on your Military Brass Belt Buckle.

But in the end the loads don't shoot any better.

[DirtySteve]

They look great..