AA#9 in 357 Mag.

[marshall623]

I picked up a pound last week , got around to shooting a few groups today in the GP100 . So far I like it , accuracy was real good and I can tell it has a lot more power over my Blue Dot loads. I was using a NOE 360-180-WFNGC over 12.2 gr. AA#9 seemed to be the sweet spot. These were .358" , I'm work around the 12.2 some and try some sized .360". Sorry no target pic's . Anyone else use this powder ? I was looking for H110 or 300MP ( they are non existent
in our area ) store owner suggested this over H110 .

[osteodoc08]

I absolutely love AA#9. It gives me top notch accuracy with high velocity and smells good to me after being lit off. I've used several pounds in my 41 mags, 357 mag and 357 sig

[fecmech]

I shot a lot of it behind the Lyman 358429 173 gr bullet using 13.5 grs. Velocity and accuracy comparable to 15 grs of 296 (1300 FPS out of a 6" bbl.)

[Maximumbob54]

Thought I would try a regular SPP to see if it was at all like 2400 and use of a magnum SPP is a must. Most of the loads either didn't fully ignite and some were just squibs. Using AA's data for a 158gr bullet I found I didn't want to even come close to max loads as extraction got sticky but beyond mid level and Win primers started looking funny. But accuracy was top notch.

[358 Win]

It's my favorite in my 1894C and 4" S&W 19-4. Super accuracy and speed using Lyman's 358156 GC boolitt. It pushes that bullet @ 1368 fps from the 19-4 and 1800 fps from the carbine. Sized .3595", Javalina Alox lube with a standard small pistol primer. The alloy is ACWW + 2% tin which when fully dressed weighs 164 grains. The charge (and work up to this very carefully) is 15.0 grains of ACC#9.

Right now the Lot of ACC#9 and Alliant 2400 that I'm working with have the same burn rate grain for grain and the same velocities when loaded grain for grain. I don't know how another Lot # may be, so when I open a new container with different Lot #, I too will have to start low and work up. No leading in either the 19-4 or the 1894C which by the way is a micr-groove barrel.

358 Win

[725]

I use it in my .357 w/ a 220 grain boolit (see Glen Fryexl's article on the "Bullet for all Seasons"). It's a wonder on hogs.

[MT Gianni]

I believe my lots of WC820 are the equivalent of AA9. I need a heavy bullet for caliber for proper ignition and when I use that I am OK with standard primers. Heavy crimp and I use my minimum weights in 357 158 gr, 170 + preferred, 245 in 44 and 250 in 45. This is not a powder for light bullets as it burns best with pressure.

[Char-Gar]

AA9 is an excellent powder for magnum handgun rounds, but it does have a quirk folks need to know. When you start to reach max pressure, the pressure will take a spike and put you over the top real quick. So sneak up on max pressure load real slow.