Hodgdon Retumbo is specifically designed for exceptionally large overbored cartridges like the 7mm Remington Ultra Magnum, the 30-378 Weatherby Magnum, and many others. It is an extruded propellant that incorporates all the great features of Hodgdon’s Extreme family of powders, including an insensitivity to any changes in hot and cold temperatures, and is perfect for big game hunting under any conditions you find.
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