I have a quantity of de-milled 30-06 brass. When I resized four or five there was black stuff all over my decapping pin which I'll assume is bullet sealant. How do I easily remove this?
I had some brass that had the sealer in them from Pat's. What I did was tumbled them in my vibratory with corn cob and some mineral spirits. I let it run for 1/2 hour them I wet tumbled them in my Thumlers Tumbler with water, joy soap and stainless steel media.
I use the same method to get the sealer off surplus bullets! The only difference is I tumble the bullets in a rotary tumbler!
Make sure you wash them out with hot water and some soap, then let them dry!
Having de-milled hundreds of military cases, the best and easiest way I have found is a Q-tip and brake cleaner. Its tedius, time consuming and a PIA, but it works with the least mess.
Bullets are easy. Place them in a plastic bowl, spray brake cleaner and swirl them around. Take a paper towl and absorb the liquid (which will be black)