Hodgdon retumbo powder is Available in 1 lb. and 8 lb. containers. This magnum, extruded powder was designed expressly for the really large overbored cartridges such as the 7mm Remington Ultra Magnum, 300 Remington Ultra Magnum, 30-378 Weatherby Magnum, etc. Retumbo adds 40-100 fps more velocity to these cartridges when https://federal209muzzleloaderpri70369.theideasblog.com/25971927/hodgdon-retumbo-smokeless-powder