When I pick up any 45 ACP range brass the first thing I do when I get it home is dump it in the tumbler to get it clean. Next I look at every case, check the headstamp and toss it in a bucket. When I run into a small primed 45 ACP w/small primer I toss it into a different bucket. If I run across a headstamp that I don't like (Amerc and unknown foreign) I toss it in the scrap bucket, and if I run across the occasional/rare steel case it gets tossed in the trash. When I get all the good cases sorted I'll return them to the tumbler for a better finish (normally I don't "polish" my brass except 45 ACP and 30-06 cases are easier to find in the dirt, rocks and trash where I shoot if they are bright and shiny).