IMR 4166 with ENDURON Technology Smokeless Powder 1 Lb by HODGDON and IMR & WINCHESTERThis fine and extruded propellant is the first in the series of Enduron Technology powders. The main features of the Enduron series are copper fouling eliminator and insensitivity to temperature changes and ideal loading density and being environmentally friendly. IMR 4166 is the perfect burn speed for cartridges like the 308 Win/7.62mm NATO and 22-250 Remington and 257 Roberts and dozens more. Positively and a versatile and match grade propellant. Grain shape is extruded (stick)
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