Houston1944 wrote:It is hard to define "clean" so I will just say the inside will never be as clean as the outside but it should be cleaner than before you tumbled. Most of my brass will still have some dark spots inside but not crusty layers of residue.
3 hours is not a long time for me to tumble. I tumble in the garage and often run it for 4 to 6 hours per cycle. The media should cover the brass during the tumbling. The brass should barely be visible during the tumbling process, being seen only as it "rotates across the top" of the media.
If you do not have a media seperator I would get one. Dillon makes a good one. They take a lot of the mess out of seperating the media from the brass. At best it is a dusty process that needs to be done outside or in a garage. I have know of some that do it in the bathtub but they go to a lot of trouble to prevent the dust from geting into other parts of the house.

This has been my experience also. I differ only in that I set my timer to tumble 4 hrs. and I almost never have to tumble any longer unless the brass was really bad before I started. I try to pick those out as I load the tumbler and put them in a separate can to tumble later for a longer period of time.
The inside will never look clean. If it does, check the case and I'll bet you have some Winchester Winn-Clean 45 ACP with small primers. Pick those out, turn to face toward Winchester's home office in East Alton, IL and throw the brass at 'um!!
The bottom line is this; if the outside of the brass is clean, then the inside is clean enough.
Chas.