I 'rattle-tub' 40s and 45s, so I don't have a lot of bulk processing.
All others (for the most part) get an initial 'rattle-tub' cleaning before being sized/deprimed. Then they go into roller buckets followed by a squirt of Dawn, steel pins and filled with water.
Tumble. I only want them clean, inside and out, and have no interesting in 'polished' shinning brass, so I don't use any chemicals other than the Dawn to break up the sizing lubrication.
After tumbling, the whole mess is dumped into a round bottomed steel bowl and flushed with clean water, lots of it. Now comes the slowest part, pick up and shake each casing under water to be rid of the steel pins and check primer pockets for double pins wedged in. And toss on to a towel.
The wet brass on the towel goes on a cookie sheet and into a pre-heated oven set to 250 to 300 degrees. In the hot over, close the door and turn off the heat. When the oven has cooled, the brass is dry. Temps are too low to cause any damage.
Back to the steel pins. Pour off the excess water and strain threw a shop towel. I sling the towel with pins in a ball to get rid of excess water. This towel is spread on an out of the way place on the carpet and all dry.
Brass and pins clean and dry, ready for the next use