Thread: Can anyone tumble some (a lot) of brass for me in CHCH

Originally Posted by hotbarrels

Buy one of these, don't bother with adding the stainless steel media, add two tea spoons of powdered citric acid and a squirt of your favorite dish washing liquid with hot water. Set the time for two hours and bling bling! Does around 500 .223 cases per batch.

Gunsmithing &Reloading Tools - Frankford Arsenal Platinum Rotary Tumbler, Brass Case Cleaning

I've had a bit of a play around with differing amounts of citric acid hydrate, and the sweet spot seems to be 1/4 teaspoon in 4l of water. Any more than that doesn't seem to do them any shinier.