I used AA#5 to work up some loads in 45, using Xtreme 200RN bullets. The standard deviations were not that great (not bad) but the accuracy was as good as anything I've tested. I was 'borrowing' some powder from a friend to try out, so I did not do as much testing as I wanted to.
It is one of those powders that if I see another pound of it at a gun show, I'm going to buy it.
I've also tried AA#7 and liked it. It gave good standard deviations through the whole charge range. It is kinda slow for 45, and takes a relatively large charge, so it is not as cost effective as other powders. I really liked it in 9mm, though, as I got some very consistent results at low charges / low velocity.