Accurate Powder features a large assortment of smokeless powders for serious loaders who want high impact for any type of firearm-including handguns, rifles, or shotguns. Accurate Powder carries a powder tailored for the type of shooting you do, whether it's full power powders for hunting or long range rifle shooting to reduced powders for cast bullets, cowboy action, handgun or target loads. If you want consistent loads that stay on target, get the advantage of Accurate!
No. 9: A slow-burning double-base spherical powder that's great for high power loads in traditional magnums, including the .357 Mag, .41 Rem Mag, and .44 Rem Mag. It's ideal for providing high velocities and an excellent case-fill, especially for the .357 Sig and 10mm auto.
Sinclair, Issue:3B, Page:101