257 Roberts Ammo
The 257 Roberts Ammo is one of those quarter bore cartridges that isn’t as popular as it should be. Surprisingly, many hunters today do not know the 257 Roberts Ammo. This is because Remington Arms introduced it in 1930. However, the design has been available since the 1920s. It was designed by Ned Roberts, who is an American hunter and a ballistician. He found out the 257 Robert Ammo worked perfectly with a 7x57mm Mauser Case.
Although Remington wanted to introduce it as the 25 Roberts Ammo, Captain E.C. Crossman advised against it because the 25 Roberts was already in production. In addition, the chambers of both cartridges differ extensively, which is why Remington renamed it to 257 Roberts Ammo.
The 257 Roberts Ammo is an excellent dual hunting cartridge that you can use for varmints. It sends a 75-grain bullet out at a muzzle velocity of 3,400 feet per second. It is also quite popular today as a medium-powered hunting cartridge. This is because it strikes an impressive balance between a flat trajectory and low recoil.
During testing, the 257 Roberts ammo sent out a 117-grain bullet at a muzzle velocity of 2,650 fps while also packing a 1,824-foot-pound punch. When tested at 500 yards, the muzzle velocity remained at 1,199 fps and 373 ft-lbs of energy. As a result, the 257 Roberts Ammo is highly recommended by the manufacturer for hunting big games like deer.
The accuracy, effectiveness, and power it offers downrange recoils moderate to mild on the shooter’s shoulder. It is ideal if you want more bullet frontal mass from your cartridge but without a high recoil.
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.
