So I found this......
http://thefiringline.com/forums/arch...?t-420508.html
Can't find it in tappatak but....
Brasso contains 2-3% of an ammonia dilute....not much.
When I first started reloading a friend mentioned it so I grabbed a bottle. Polished my first 2500 cases with a cap full plus a squirt each 700 maybe. I have loaded 1800 maybe with no bad signs. I might keep these segrigated and continue to clean with brasso(it works SO incredibly well!) While keeping a 1k lot polished with nufinish(it works...)
These are 9 para BTW.
Anyways, ammonia evaporates pretty quick and I don't keep current media in an airtight container....so the little that's in there prolly wont be around the brass longer then the tumbling session.
IDK ill post results in 5-7 years...