IMR's Enduron Technology extruded powder reduces copper fouling while maintaining temperature stability. Ideal for mid-range cartridges like .30-06, .270 Winchester, and .300 WSM with excellent loading density.
IMR has engineered a sophisticated line of extruded powders built on Enduron Technology—a modern propellant system designed for the discerning handloader.
IMR 4166 performs exceptionally well in mid-range burn speed cartridges, including:
Each container holds 8 pounds of powder, providing ample supply for serious handloaders.
Whether you're developing precision loads for hunting or target shooting, IMR 4166 Enduron delivers the consistency and performance that experienced reloaders demand.