There is a decent thread about wet tumbling with SS and citric acid on ar15.com. Probably a few threads actually. I have tried the method where you just let it sit in the water, and with SS wet tumbling. The tumbling works a lot better.  I only run new (after fired) for about 30 mins and that is probably longer than needed.

The citric acid really is helpful when you are trying to clean up old black stuff. I have some stuff from the 60's I found and it looks like I bought it new.

What was the price for this? it is out of stock now.  Underwood is $27 a box for 180 tmj's. Using the example above if you ordered 10 boxes the shipping would be about $2.50 a box.  BTW they have had 180 TMJ's in stock every day for the last week. I don't know what the cabelas price for that rem was but a local store here had that same stuff for $36/box plus tax(that is their normal price not inflated). Not a deal IMO.

They have put the 180 TMJ's up every day for the last week, not including the weekend.  They update their stock at or near 3pm EST also, if that helps.