.257 Weatherby Magnum 120 Grain Nosler Partition~ The .257 Weatherby Magnum is a .257 Caliber (6.35 mm) belted bottlenecked cartridge. It is one of the original standard length magnums developed by shortening the .375 H&H Magnum case to approx. 2.5 in (64 mm). Of the cartridges developed by Roy Weatherby in 1944, the .257 Weatherby Magnum was known to have been his favorite, and the cartridge currently ranks third in Weatherby cartridge sales, after the .30-378 Weatherby Magnum and the .300 Weatherby Magnum.
The .257 Weatherby Magnum is among one of the flattest shooting commercial cartridges. The .257 Weatherby Magnum shares the same cartridge case as the .270 Weatherby Magnum and the 7mm Weatherby Magnum. The .30 Super Belted Rimless H&H manufactured by Winchester served as the direct parent cartridge for the case design. The .257 Weatherby Magnum was one of the first cartridges which used the shortened, blown out and necked down .375 H&H Magnum case and served as the forerunner to the standard length magnum cartridges such as the 7mm Remington Magnum and the .338 Winchester Magnum. There has been some speculation that Roy Weatherby may have used the full length .375 H&H Magnum case if he had slow burning powders available today when the cartridge was designed.
Our 100% Hand-Loaded .257 Weatherby 120 grain Nosler Partition rounds are loaded with extremely tight tolerances, producing highly accurate, consistent and reliable performance with each and every shot! Proprietary load formulas and our hand loading techniques offer the finest ammunition on the commercial market today.
Nosler’s special lead alloy, dual core provides superior mushrooming performance at virtually all impact velocities. The Partition’s fully tapered copper jacket gradually thickens along the bullet’s axis, controlling the core’s mushroom for controlled, uniform expansion. An integral partition separates the bullet’s two cores, holding two-thirds of the bullet’s original weight in the rear core to fuel a deep penetration every time. Special crimp locks help the bullet resist deformation, even with the heaviest of magnum loads. Each Partition bullet is designed by Nosler engineers to give you the optimum length, weight, and ogive design for each caliber to give you maximum flight and terminal performance. Minimum impact velocity: 1800 fps. There aren’t a lot of true disadvantages to this bullet because it is truly “debugged” technology. Newer bullets are very specialized for certain uses – some are for large game, some are for long range, and some are just for penetration or expansion. The Nosler Partition is more of a “jack of all trades and master of none” at this stage in bullet technology.
- Velocity 3200 fps
- 100% hand Loaded