IMR Enduron 7977 exhibits a slower burn rate within the Enduron series. Its loading density is ideal for magnum cartridges, enhancing uniformity. This propellant is specifically designed for magnum applications, delivering exceptional performance in cartridges such as the .300 Win Mag, 7mm Remington Magnum and .338 Lapua, among others. The loading density is optimal for magnums, effectively filling the case at maximum charges, which contributes to excellent uniformity and accuracy.

The Enduron series boasts advanced features including a copper fouling eliminator, temperature change insensitivity, optimal loading density and eco-friendly design
IMR 7977 exhibits performance similar to Hodgdon H1000, however, the charge weights differ significantly
Manufactured and assembled in compliance with Canadian industry standards and regulations

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