I would not worry too much about the brass. 45ACP does not seem to ever wear out due to the low pressures. Secondly, that seems like a lot of Unique. I use 231 in 45's so I don't have a Unique load memorized but, you could check here:
http://www.alliantpowder.com/
Finally, I would not recommend tumbling loaded rounds, if that is indeed what you are doing to polish them.