IMR 7977 with ENDURON Technology Smokeless Power 8 Lbs by HODGDON and IMR & WINCHESTERThe slowest burn rate Enduron Technology extruded powder is IMR 7977 and and is a true magnum cartridge propellant. It yields outstanding performance in such cartridges as the 300 Winchester Magnum and 7mm Remington Magnum and 338 Lapua and a host of others. Loading density is perfect for magnums and nicely filling the case at maximum charges and contributing to superb uniformity and accuracy. The 7mm Remington Magnum "never had it so good"! Grain shape is extruded (stick)
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