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IMR Enduron Smokeless Powders

IMR truly represents Legendary powders – the IMR powders we reload today had their DNA established over 200 years ago. From World Wars I and II, to 1,000 yard benchrest competition, to your deer stand, IMR Legendary Powders are the standard all others attempt to follow.
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Enduron Smokeles

IMR Enduron Smokeless Powders

***NEW*** IMR ENDURON ***NEW***

IMR 4955™


New for 2016, versatile IMR 4955™ will help you triumph, regardless of the elements or the size of your target. Falling between IMR 4451 and IMR 7977 in burn speed, it can be loaded in popular cartridges like the .25-06, .270 Winchester, .280 Remington and .300 Winchester Mag. IMR 4955 with Enduron: trusted when Mother Nature can't be

IMR 4166™

IMR 4166

This fine, extruded propellant is the first in the series of Enduron Technology powders. The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. IMR 4166 is the perfect burn speed for cartridges like the 308 Win/7.62mm NATO, 22-250 Remington, 257 Roberts and dozens more. Positively, a versatile, match grade propellant.

IMR 4451™

IMR 4451

Another new Enduron extruded powder, IMR 4451, gives top performance in the venerable 30-06, 270 Winchester and 300 Winchester Short Magnum, to name just a few. This propellant is ideally suited for many, many mid-range burn speed cartridges. Simply scroll through the list of cartridges on the Hodgdon Reloading Data Center, and see how many of your favorite cartridges are covered with this fine powder. Once the shooter tries this one in that favorite cartridge, his search is over!

IMR 7977™

IMR 7977

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”!

For More Information: IMR Smokeless Rifle Powders