I'd try Unique as a substitute. I've had good luck with it in .357. 6.0, 6.5gr under a 158gr SWC would get you in the 1000-1100fps range.
That said with the Accurate powders, I'd stick with AA#5 when you find it again. Suited for the velocity range you are looking for.
That said with the Accurate powders, I'd stick with AA#5 when you find it again. Suited for the velocity range you are looking for.