Looking for advice on a 10mm powder for longer barrel pistols (G40)

[Wes Sage]

AA#9 is what I worked up With FishFace (Dave) in the old SGN Days.
He had a 7" and we got the best velocity and accuracy out of it

[Barfly]

AA#9 is what I worked up With FishFace (Dave) in the old SGN Days.
He had a 7" and we got the best velocity and accuracy out of it

I was definitely going to try some loads with the #9 i have leftover from my .44 mag loading. I was just looking to see if any other powders might give me more of a velocity boost with the longer barrel.