I have a Thumblers Tumbler That I use for Cleaning 45ACP & 9MM That will make the Brass shine like Gold if you want. The Formula That I use is CHEAP
Which I like. The formula to use follows. The tumbler Barrel is Filled within 1-2" from the top with Water, Add one TBS of Dove DW soap, 1/8 teaspoon of lemashine,
then add two TBS of Simple Green, I use this & run for two Hours or longer till I get the Shine I want. This works for me better than the SS media which was a pain
since the Brass would start to discolor after they were dry. This will also make the Brass easier to load in my Dillon 550 and no discolor. Give it a try & just lay the Brass on a large
towel to dry when removed from the tumbler.