IMR Enduron 8133 — New Slow-Burn-Rate Magnum Powder
IMR, a Hodgdon Powder Company brand, will soon release a new, slow-burn-rate magnum powder, IMR Enduron® 8133. This new powder is designed for large, magnum cartridges, such as .300 Win Magnum, .300 Remington Ultra Magnum, and 28 Nosler, among others. With the slowest burn rate among Enduron powders, 8133 has burn properties similar to Hodgdon Retumbo. The new Enduron 8133 powder will be available in 1-lb and 8-lb canisters starting in February 2018. Load Data for this new powder is already listed on the Hodgdon Reloading Data Center.
CLICK HERE for IMR Enduron 8133 Reloading Data »
IMR® Legendary Powders now offers five (5) Enduron powders: IMR 4166, IMR 4451, IMR 4955, IMR 7977, and IMR 8133. “It was always our intent to fill out the Enduron line with a magnum powder and we could not be happier with how 8133 performed in development and testing,” says Ron Reiber, Hodgdon ballistician. “This powder delivers the [slow burn rate] magnum-caliber reloaders require and adds all of the performance characteristics of the Enduron line of powders”. These qualities include temp stability, significantly reduced copper fouling, and optimal load density.
Modern Powder Technology for Enhanced Performance
Copper fouling reduction – these powders contain an additive that drastically reduces copper fouling in the gun barrel. Copper fouling should be minimal, allowing shooters to spend more time shooting and less time cleaning a rifle to retain accuracy.
Temperature change stability – the Enduron line is insensitive to temperature changes. Whether a rifle is sighted in during the heat of summer, hunted in a November snowstorm or hunting multiple locations with drastic temperature swings, point of impact with ammunition loaded with Enduron technology will be very consistent.
Optimal load density - Enduron powders provide optimal load density, assisting in maintaining low standard deviations in velocity and pressure, a key feature for top accuracy.
Environmentally friendly - Enduron technology is environmentally friendly, crafted using raw materials that are not harmful to the environment.
The Enduron Line-Up of Five Powders
IMR now offers FIVE Enduron powders that cover a broad range of burn rates. They are suitable for a wide variety of cartridges, from small varmint cartridges all the way up to the .338 Lapua Magnum.
IMR 4166 possesses the fastest burn rate in the Enduron lineup. It is the perfect burn speed for cartridges such as .308 Win, 7.62mm NATO, 22-250 Rem and 257 Roberts. A versatile, match-grade propellant, IMR 4166 is comparable to Hodgdon® Varget.
IMR 4451 is a mid-range burn speed powder, ideally suited for cartridges such as .270 Winchester, .30-06 and 300 Winchester Short Magnum. This powder is comparable to Hodgdon H4350.
IMR 4955 is a medium burn speed powder, falling in between IMR 4451 and IMR 7977 in burn speed. It provides top performance in big game cartridges such as 25-06, 280 Remington and 300 Winchester Magnum. This powder is comparable to Hodgdon H4831.
IMR 7977 has the second slowest burn rate among the Enduron Technology powders. It yields great performance in .300 Winchester Magnum, 7MM Remington Magnum, and .338 Lapua Magnum. IMR 7977 is comparable to Hodgdon H1000.
IMR 8133 is designed specifically for magnum calibers, such as .300 Remington Ultra Magnum, 28 Nosler, or the .264 Winchester Magnum, among many others. This new powder has the slowest burn rate among the Enduron powders and compares in burn rate to Hodgdon Retumbo.
Similar Posts:
- Guide to IMR’s Enduron Powders — What You Need to Know
- Guide to IMR Enduron Powders: 4166, 4451, 4955, 7977, 8933
- Guide to IMR Enduron Powders — Temp Stable, Reduced Fouling
- IMR Introduces New Enduron Powders: 4166, 4451, 7977
- IMR® Powders introduces IMR 4955 Enduron Powder
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Tags: Enduron Powder, IMR 8133, Magnum Cartridge, Slow Burn Rate Powder, Temp Stability
Use the 4955 and the 4451 both work well in caliber that I have chosen to burn them in.
During pressure testing in my 28” 280 Ackley, 8133 sent 183 SMKs at almost 2900, and 197 SMKs at 2750 with virgin Nolser brass and CCI BR2s. Even at 3.5+ inches COAL, there was considerable “crunch” while seating, but no flattening of the primers or abnormal bolt lift. Looking forward to accuracy testing next; at least in my rifle, this stuff flat cooks.
Weatherby 300 reloading info for 8133 is almost unfindable. Do you have any data or put me onto a source for it? You can use the email address above for any information you find. Thank you, Steve Bierce
Same as what Stephen said, load data for 300 Weatherby
I would love to have some starting and max loads for my 29 inch barreled Ruger #1 in 7mm Remington Ultra-Mag for IMR 8133. Bullet weights will be in the 160-180 gr. range. Thanks!
Brien
The Hodgdon 2018 & 2019 Annuals have Data
What kind of data is out there for 300 R U M / 200 gr. Berger using IMR 8133 powder “ I am looking for good long range preference.
where can I purchase this powder? I keep finding “out of stock, no backorders”
What kind of data is out there for 300 R U M / 210 gr.VLD Berger using IMR 8133 powder “ I am looking for good long range preference.
load data 8133 powder 30-378 180 gr bullet, and weatherby 300 180 gr bullet.
I need load data or IMR 8133 powder in a 308,3006,223 if cant find any will prob sell this new pound i have
EDITOR: Go to the Hodgdon Reloading Data Center: https://www.hodgdonreloading.com/
How about some 8133 load data for the 7mm stw?