Good powder, I load 11.5 grains for approx 1200 fps, pressure under 11000 psi which I like to keep under when shootin in my Briley tubes.
Alliant web-site shows 12 grains with a win209 primer, win AAHS hull,
win WAA41HS wad, 1,200 fps & 10,570 psi
Works real well in the loader for me, doesn't bung up the charge bar.