The latest IMR Legendary Powder, IMR 8133, is an Enduron Technology
powder. It was designed to provide optimum performance in the large overbored cartridges
like the 300 Remington Ultra Magnum, 6.5mm-300 Weatherby Magnum, 28 Nosler and a
host of other fine magnum cartridges. It provides excellent loading density, copper fouling
eliminator, insensitivity to extreme temperature changes and is environmentally friendly. It is,
without equal, the consummate big game cartridge propellant.