99, I have a 3 lb. Tumbler only clean 25 308 cal. at a time, the SS pins did a great job. I let them tumble for 2 hrs. 1 lb. Pins, 25 cases, water , dawn blue soap & lemiShine. Hand dried & let them sit in the plastic bullet holders that comes with the store bought rounds. Looks like I will retire the media tumbler for now. Have you used the pins on calibers lower then 30 cal.