IMR powder production dates back more than 200 years, when E.I. DuPont founded the company. The IMR series of powder is trusted by reloaders all over the world and is suitable for a wide range of reloading applications.
This finely extruded propellant is the first in the Enduron Technology powder series. The Enduron series is distinguished by its copper fouling eliminator, insensitivity to temperature changes, ideal loading density, and environmental friendliness. IMR 4166 is the ideal burn speed for cartridges such as the 308 Win/7.62mm NATO, 22-250 Remington, 257 Roberts, and a variety of others. A versatile, match grade propellant, to be sure.
- 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