The term 'Weatherby' is one that has been closely synonymous with speed. The.257 Weatherby Magnum is part of the Weatherby series of hunting cartridges, which are distinguished by its trademark double-radius shoulder, brass belt, and large case capacity.
The.257 Magnum was Roy Weatherby's favorite of all the cartridges he developed in the Weatherby series. It currently ranks third in the Weatherby cartridge series.
The.257 Weatherby Magnum was one of the earliest standard-length magnums, manufactured by shortening the.375 H&H Magnum case to roughly 2.5 inches (64 mm). It's a commercial flat-shooting cartridge that can fire a 115 grain (7.5 g) Nosler Ballistic Tip bullet at 3,400 feet per second (1,036 meters per second) while producing 2,952 feet per pound of force (4,002 J) of energy.
The 257 Wby. Magallowable .'s pressure of 65,000 psi is one of the reasons it travels so quickly. It's a better round than 800-yards from a ballistic standpoint.
The.257 Weatherby's limits are essentially up to the shooter. It works best on light to medium weight games weighing between 20kg (44lb) to 150kg (330lb). The top limit of 180kg (400lb) is still considered safe. They were used to kill a rhinoceros by Roy Weatherby himself just to show that it can be done. With that said, the .257 Weatherby Magnum will perform over and above what you’d typically expect from such a bore diameter.
The.257 Weatherby Magnum cartridge is a tremendously powerful cartridge that is unlike any other.257 diameter cartridge in that it can employ a huge target area up to substantial ranges.
The 270 Weatherby Magnum was the first belted magnum created by Roy Weatherby in 1943, based on the.300 H&H Magnum. The cartridge was one of a series of Weatherby Magnums that shared a 2.545" (64.64mm) case length at the time of its introduction. The.270 established a tiny but devoted following, similar to that of the rest of the Weatherby line of cartridges, which has remained stable to this day, despite new developments like the.270WSM.
The 270 Weatherby Magnum is a hard-hitting, powerful, flat-shooting cartridge. The.270 Weatherby has about 200 ft/s faster performance with any bullet weight due to its higher pressure and larger case that holds more power than the.270 Winchester. Despite its distinctive case design, it is not a specialist cartridge, but rather an outstanding all-around medium game cartridge with minimal recoil (for a magnum). It delivers powerful shock for quick killing at ranges of up to 325 yards. Broad wounding lasts around 450 yards, after which wound channels become more commensurate to the calibre.
The 270 Weatherby Magnum is best suited for light to medium games. Using a bullet of sound construction on larger animals such as Elk, a bullet of sound construction can generate broad, quick bleeding wounds and free-flowing exit wounds on game weighing up to 320kg (700lb). The 270 Weatherby Magnum is the preferred calibre. It is adequate for larger game animals.
Regardless of newer inventions, the 270 Weatherby Magnum continues to keep its own as an emphatic killer of light to medium game, and it does so without creating excruciating recoil - two features that will assure its popularity for many years to come.