Accurate 11FS seems to have potential in Magnum Handgun cartridge with medium to heavyweight bullets.
It features a flash suppressant, and is designed for 300 Blackout with short barrels (16"), which has geometry analogous to straight-wall and small-bottlenecked handgun cartridges.
Like most modern load data, the 357 Magnum max loads are weak, but I suppose they could be used as starting loads for 357 maximum. It may be a better powder in these applications than Win 296, Lil-Gun, AA1680, etc.
Anybody played around with it yet?