Score
AA#2 is a fantastic powder.
For starters, nothing meters better. Nothing.
Although AA#2 nestles clearly in the fast powder category (with W231/HP-38, Bullseye, VV312, Titewad, Clays, Red Dot, Zip), it has just a bit of "slowness" to it that allows for some load workup to modest SD performance levels, suitable for short barrel applications. Naturally low flash and low recoil - both good qualities for SD. My work up to 8.0gn under a 125gn JHP in 357 Mag delivers 1195 fps through a 3" bbl. An excellent performing short barrel shooter.
But I digress. I didn't mean to tout its defense application ability. That's not its wheelhouse. I was only making the point that it doesn't quite pop as hard and fast as other fast powders.
I have found that AA#2 makes excellent 115g range shooters for 9mm. 124's too. Runs super duper clean. I've even used it for modest 180gn low recoil rounds for 10mm. And where I've got it to shine the brightest is with 38 Special plated DEWC's. Superb accuracy and extremely low Standard Deviation chrono numbers. Now in this 38 Special application, it's underpressured and leaves this fine chartreuse colored "sand" behind. But it isn't gummy at all; and it's not that big o' deal. What's so amazing is how incredibly consistent it performs in this application while it's clearly running in an underpressure and less than ideal condition. Neat.
Yeah, big fan of AA#2. I have about 2 Lbs remaining, and I reserve it for semi-auto applications. Problem is, I haven't seen the stuff anywhere for sale in over 2 years. I wouldn't even be surprised if it hasn't been in production during this time.