IMR Enduron® 8133
$49.99 - $357.99
IMR Enduron® 8133
IMR Enduron® 8133
IMR Enduron® 8133
IMR Enduron® 8133
IMR Enduron® 8133
IMR Enduron® 8133

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.

IMR recommends always consulting for the most accurate, up-to-date data.

Available in 1-LB and 8-LB containers.


Warnings for California Residents

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WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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Reviews and Ratings

Doug Herold
IMR 8133

Been loading my 7Rem Mag with 8133 for the last two years. Have found it to be very accurate and consistent: sub 0.05 moa with es <20. Very happy with this product.

6.5 PRC

Finally found a great powder for my 6.5 PRC Browning LR X-bolt. Dialed scope in at 100 yards using 143 ELD-X and 59.0 grains of IMR8133. Results were night and day compared to other powders. 4 shot groups at 100 covered with a dime! 200 yards nickel size groups. Amazing!!!

Justin Wise
30-378 with IMR8133

Start at their starting load! Their max load is way too much. I loaded some 212 grain eld-x with 107 grains of IMR8133 and it stuck the bolt in my accumark. I can't even imagine what would happen if you put their suggested max load of 109 grains behind a 220 grain bullet. Hodgdon needs to rethink some of these numbers as I have noticed other calibers with max loads that are way too hot. I noticed their Retumbo load is way to hot as well.