I deprime my brass before tumbling wet w/SS media. It helps to see defects and minimizes the grunge on the press/dies. New rifle brass gets full length sized and trimmed & chamfered before loading. The big rifle brass has the primer pockets uniformed and flash holes deburred as well. Finished rifle rounds get the sizing lube removed via a vibe cleaner filled with untreated walnut with an added tablespoon of odorless mineral spirits.
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"Of all the things I've lost, I miss my mind the most." A. Brilliant
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