I think I'm going to stay with your first 2 picks. Longshot will be my backup powder.
Yes AA#7 has alot of greyish smoke out of my comp and popple holes. But its the first powder that I actually feel the gas on my face when shooting it. Its the flattest load Ive messed with to date.
This is me messing with HS6, autocomp, 3N38, true blue, Silhouette, LongShot and now AA#7.