Ramshot powders are double-based, spherical-shaped, smokeless powders that meter easy, burn clean and produce high velocities. Excellent lot-to-lot consistencies for repeatable accuracy between loads. Magnum is a clean burning powder with excellent velocity making it a great choice for high volume match shooters. Big Boy powder was renamed Magnum in 2001 and all Big Boy data is applicable for Magnum. Excellent performer in the .25-06, .270 WSM, 7mm Rem Mag, .300 WBY, .300 Win Mag, and 300 RUM. Mfg: Ramshot Powder