Ramshot Magnum Rifle Smokeless Powder - 1lb Can - It provides outstanding performance from the popular 7mm Rem Mag and 300 Win Mag through the Remington Ultra Mags and 338 Lapua. Magnum is a double-base spherical propellant that is the number one choice for high performance magnum cartridges. Ultimate Magnum Rifle Powder High Performance Outstanding in 7mm Rem, 300 Win Mag and 338 Lapua 1lb