This is my method for once fired brass.
1.) Soak, wash and rinse.
2.) Spread out on towel to air dry.
3.) Lube, resize, and deprime.
4.) Trim to length, and chamfer inside and out. (Giraud Power Case Trimmer does it all in one operation).
5.) Swage out crimped in primer pockets. (Dillon Super Swage 600).
6.) Tumble and polish. (Dillon FL-2000 using ground corn cob and Dillon Rapid Polish).
7.) Run through the Dillon progressive.
I use a decapping die in place of the resizing die. (They have already been resized). This assures the flash hole is clean and free of any polishing media. A decapping pin passes through the flash hole just before repriming.
Right now I'm not set up to do Stainless Steel Pin Media tumbling in high volume. All I've got is a Thumlers Tumbler with Stainless Steel Media. It does a fantastic job, making once fired brass look like never fired, brand new brass, both inside and out. But I need a bigger tumbler so I can do it in larger volume.
http://www.arrowheadlapidarysupply.com/catalog/item.php?unid=8734&prodpa=0This is the tumbler I want. It has an 8 gallon barrel, and would be perfect for large volume Stainless Steel tumbling. It's just really hard to justify spending $722.00 on a tumbler. It is a commercial grade model used mainly for rock tumbling. It has a 65 pound capacity. That's a lot of water, pins, and brass.
I thought of going with a cheaper alternative. Like one of those small electric cement mixers from Harbor Freight. But I've heard they don't hold up to long hour usage. They're meant for small, occasional jobs. Not to be run for hours on end, like in a tumbling operation. And they're too big. I'd have to keep it on the back patio. Then your house starts looking like a hillbilly stronghold. (I would have to get a few junk cars to park in the front yard, and a couple of old washing machines).