I did a load of laundry the other day and forgot that I had a hand full of .45 ACP brass in the pocket of the pants I was washing. When the load was done, I pulled out the clothes and found 4 .45 ACP cased in the bottom of the tub sparkling like golden nuggets, clean as a whistle inside and out. Liquid Tide was the cleaning agent, and the cases even smelled good. Zero residue, clean, clean, clean. Cheers.