How long do you tumble brass?

[novalty]

Use corn cob media in a Lyman 1200, with Frankford Arsenal polish added. I change out my media pretty frequently. I run a full batch of 300-500 pistol cases for about 2 hours with new media to clean, then I reuse the batch for another 300-500 and that usual takes about 3 hours for the same results. I then dump the media and add new stuff. I don't shoot a huge amount so an 8lb bag of corncob media, which is about $4 OTD at Wally World will last me about 2 years worth of shooting.

 

[yeti]

Decap then 4 hours in fine walnut with Nu Finish added, works beautifully as long as I put a reasonable amount of brass into the tumbler. No further primer pocket cleaning necessary.

 

[MikeyB]

2-3 hours works well for me. Don't have to pretty, just clean.