Tailored specifically for the considerably large overbored cartridges like the 7mm Remington Ultra Magnum, 300 Remington Ultra Magnum and 30-378 Weatherby Magnum, Retumbo takes the form of a magnum, extruded powder. Within these cartridges, Retumbo elevates velocity by 40-100 fps compared to typical magnum powders. Notably, it qualifies as an Extreme Powder, thus rendering it an impeccable choice for substantial game hunting across all conceivable conditions.