IMR Enduron 7977 Powder Production of IMR powders dates back over 200 years when the company was originally founded by E.I DuPont. Available for use in many reloading applications, the IMR series of powder is trusted by reloaders all across the globe.
The slowest burn rate Enduron Technology extruded powder is IMR 7977, and is a true magnum cartridge propellant. It yields outstanding performance in such cartridges as the 300 Winchester Magnum, 7mm Remington Magnum, 338 Lapua and a host of others. Loading density is perfect for magnums, nicely filling the case at maximum charges, contributing to superb uniformity and accuracy. The 7mm Remington Magnum “never had it so good”!
- Do not exceed the loads displayed in the reloaders guide
- Never mix any two powders regardless of type, brand, or source
- Never substitute any smokeless powder for Black Powder or any Black Powder substitute
IMR Enduron 7977 Powder Specifications
IMR Enduron 7977 Powder Delivery Information
The slower burn rate in the Enduron family is the IMR Enduron. For magnums, Loading density is perfect contributing to very good uniformity. This is a true magnum propellant resulting exceptionally good performance in 300 Winchester Magnum, among other cartridges, 7mm Remington Magnum and 338 Lapua. Also, Loading density is perfect for magnums, maximum charges, nicely filling the case at maximum charges, contributing to a very good uniformity and accuracy.
The principal features of the Enduron series are insensitivity to temperature changes, copper fouling eliminator, being environmentally friendly and ideal loading density
IMR 7977 act comparably to Hodgdon H1000 though charge weights has materially other than the original material and that makes it good.