Accurate No. 7 powder is an intermediate to slow burning, double-base, spherical powder is ideal for many handgun applications and a broad range of calibers. Since its introduction in 1983, this powder has become very popular among IPSC shooters. While originally developed for high intensity, Accurate No. 7 powder can also be used as a cost effective solution in larger magnum handgun calibers, as well as high performance semi-auto handguns like the 38 Super, 357 Sig, and 40 S&W.