1) you will never clean the inside of the case well qithin a reasonable amount of time with a vibratory unit and media alone, the action precludes it. Cob is better than walnut for dust and does a fine job.I’m using walnut shell media and not very happy with the inside of the brass. I run the tumbler for about 2hrs roughly. Do I need to run it longer? Use different media like sand? Not sure what I’m not doing right. And occasionally a piece of the media will get stuck in the flash hole and need to be pushed out.
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