Winchester spherical powders are known for theirconsistent burn rates and clean burning characteristicsand are widely used for reloading shotshell,handgun, and rifle ammunition. As the name implies, this powder is designed to deliver optimum performance incompensated race guns. AutoComp has been formulated to help the compensatorwork more efficiently while it minimizes muzzle flash to help with rapid fire. Highlyrecommended for 38 Super, 9mm, 40 S&W, and 45 ACP.
Sinclair, Issue:4B, Page:099