Product Information: IMR Enduron 7977 Powder

IMR 7977 is a high-energy smokeless propellant specifically formulated for magnum rifle cartridges. This magnum propellant is available in stock in 1 lb and 8 lb containers. Whether you’re a long-range shooter, a big game hunter, or a reloader in search of exceptional performance, IMR 7977 for sale offers impressive qualities.

IMR 7977 powder is known for its slow burn rate, which allows for controlled and consistent pressure development. The slow burn rate of IMR 7977 powder is ideal for magnum rifle cartridges, providing excellent performance in terms of velocity and energy transfer. The powder’s burn characteristics ensure reliable ignition and consistent performance, even in extreme temperature conditions.

IMR 7977 is well-suited for a variety of magnum rifle cartridges, including popular calibers such as .300 Winchester Magnum, .338 Lapua Magnum, .375 H&H Magnum, and others.

Its high-energy output makes it an excellent choice for long-range shooting, big game hunting, and other applications where maximum power and energy transfer are desired. Whether you’re pursuing large game or engaging targets at extended distances, IMR 7977 can deliver the performance you need.

The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. IMR 7977 performs comparably to Hodgdon H1000 but charge weights are materially different.

To achieve optimal results with this high-energy powder, it is important to follow the loading recommendations and data provided by IMR Powder. The load data specifies the appropriate charge weights, bullet weights, seating depths, and overall cartridge lengths for specific magnum calibers.

Adhering to these recommendations ensures safe and efficient reloading while maximizing the performance of this magnum powder. Always start with the minimum recommended load and work up while carefully monitoring pressure signs.

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

Important Information:

• It is imperative that you do not go over the loads that are specified in the reloaders handbook.
• Never, ever combine any powders, regardless of the kind, brand, or origin of any powder.
• Never attempt to use smokeless powder as a replacement for black powder or any other kind of black powder alternative.

Specifications and Features:

• Smokeless gunpowder that has been extruded
• Maximum velocities achieved using magnum-caliber casings
• Insensitive to the effects of changing temperatures