IMR Enduron 4166 Smokeless Gun Powder





Important Information:

  • 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 4166 For Sale

The production of IMR Enduron 4166 powders dates back more than 200 years when E originally founded the company. Available for use in many reloading applications, the IMR powder series is trusted by reloaders around the world.

This fine extruded fuel is the first in Enduron Technology’s powder series. The main features of the IMR4166 series are copper scale remover, insensitivity to temperature changes, ideal charge density and environmental friendliness. Winchester Super-X Ammunition, 4166 is the perfect burn rate for cartridges like the 308 Win/7.62mm NATO, 22-250 Remington, 257 Roberts, and dozens more. Positively, it is a versatile and match-friendly booster.

Important Information:

  • Do not exceed the charges shown in the recharger guide.
  • Never mix two powders still of type, brand or source.
  • Never substitute black powder for smokeless powder or any black powder substitute.

IMR 4166 Load Data | IMR 4166 in Stock | IMR 4166 Reloading Data

This new Enduron® extruded powder has superior performance with such excellent cartridges as the 270 Winchester, 280 Remington, 25-06 Remington, 300 Winchester Magnum and many, many more. It sits directly between IMR 4451 and IMR 7977 in recording speed, providing maximum performance for all cartridges used in the big game. 

As with all Enduron powders, it is temperature-insensitive, clean-burning, minimizes copper contamination and is completely environmentally safe. Adding this fuel to the Enduron line ranked high on the chart. IMR 4166, plus the original three, provides top loading for cartridges from 223 Remington to the massive 500 Nitro Express Magnum.


Product Information

8 Pound

Delivery Information

Shipping Weight
8.400 Pounds
Carrier Restrictions
  • Cannot ship via air
  • Cannot ship via USPS
  • Cannot ship to PO Box
  • Must ship to Contiguous US

1 review for IMR Enduron 4166 Smokeless Gun Powder

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