Smokeless pistol powder. Designed for high performance in semi-automatic pistols and is the powder of choice for 9mm, .40 S&W and .357 SIG. Fast burning and consistent, Economical and accurate,Great for light 12 gauge loads. Principal Purpose-High performance 9mm, .40 S&W and 10mm. Secondary Uses-Moderate pistol cartridges. Remarks-Best choice for high performance 9mm, .40 S&W and 10mm.