IMR Legendary Powders, hailing from Shawnee, Kansas, has crafted a remarkable advancement in propellant technology with the introduction of their Enduron Technology line. At the forefront is the IMR 7977 powder, designed for those who demand nothing short of excellence when it comes to magnum cartridge performance.
This sophisticated extruded powder boasts the slowest burn rate within its class, making it an ideal choice for true magnum cartridges. Whether you're loading for the 300 Winchester Magnum, 7mm Remington Magnum, or even the formidable 338 Lapua, this propellant delivers outstanding results across a variety of high-performance applications.
The hallmark of IMR 7977 lies in its meticulous design that ensures perfect loading density for magnums. This means your case will be filled optimally at maximum charges—an essential factor that contributes to exceptional uniformity and accuracy shot after shot.
Additionally, this fine extruded powder incorporates a unique copper fouling eliminator and exhibits insensitivity to temperature changes. Such features not only enhance shooting consistency but also align with environmentally conscious practices—a testament to IMR's commitment to innovation without compromise.
For aficionados of precision and power alike, there's no denying that as far as reloading goes: The legendary 7mm Remington Magnum "never had it so good!"