I got into AA#9 going on six years ago when I ran out of 2400, and #9 was the only powder I could find any where online that that fit .357 level loads. I haven't done much experimenting with it. I was just looking to run the Berrys' 125 grain plated bullet at about 90% of the Remington SJHP 125 gr. that's my carry load. 13.0 grains AA#9 gave me just what I was looking for. When checked side by side, the handload generally does right around 90% of the velocity of the factory load in the same gun on the same day. About the level of Golden Saber and Gold Dots. Easier on the joints in old hands for 50 to 100 round sessions, but close enough that there's no disconnect when shooting the factory load. I'm up to 20,000 rounds loaded with that combination, (Winchester SMP primers) and I'm very happy with it.