Accurate No. 7 is a double base, ball propellant originally developed for high intensity cartridges. Originally introduced to reloaders in 1983, No. 7 has become a popular powder for IPSC shooters. It is also a good choice for magnum handgun cartridges when slightly less than full power loads are preferred. No. 7 is an excellent choice for high performance semi-auto handguns such as the 357 Sig, 38 Super, and 40 S&W. No. 7 is also a cost effective solution in larger magnum handgun calibers.
Warnings from the Manufacturer: