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.
IMR Enduron 8133 is the slowest burn rate in the Enduron family. Loading density is perfect for magnums, contributing to superb uniformity. This is a true magnum propellant yielding outstanding performance in 6.5-300 Weatherby, 264 Win Mag, 28 Nosler, and 300 Rem Ultra Mag, among other cartridges. Loading density is perfect for magnums, nicely filling the case at maximum charges, contributing to superb uniformity and accuracy.
The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density, and being environmentally friendly.
IMR 8133 performs comparably to Hodgdon Retumbo but charge weights are materially different.
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.
Made In the United States of America
￼ WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov.
QuantityPlease select country of Origin
United States of America
1.140 Pounds – 8.400 Pounds
Cannot ship via air
Cannot ship via USPS
Cannot ship to PO Box
Must ship to Contiguous US
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Hazardous Material. Must ship ground only. Not eligible for expedited shipping. Contiguous 48 states only. A physical address is required for delivery.
For safety reasons, we do not accept returns on ammunition, black powder, primers, reloading lead, and brass or bullets.
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Due to increased demand, Bass Pro Shop and Cabela’s is limiting pistol ammunition that can be purchased to 5 boxes per item.