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A magnum cartridge is a firearm cartridge with a larger case size than, or derived from, a similar cartridge of the same projectile caliber and case shoulder shape. [ clarification needed ] The term derives from the .357 Magnum , the original revolver cartridge with this designation.
The .257 Weatherby Magnum is a .257 caliber (6.53 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).
[9] [10] Weatherby has designed almost all of its cartridges with belts; curved, double-radius shoulders; and considerable freebore. The .224 Weatherby Magnum, introduced in 1963, was the first and, for more than 50 years, the only Weatherby cartridge to have an angled shoulder but included the company's other distinctive features. [11]
The Wapiti is a more complicated wildcat based on the .300 H&H Magnum being necked-down, trimmed, and then fire-formed. The large case is well-suited to heavy bullets. Performance with a 160-grain (10 g) bullet is approximately 3,225 ft/s (983 m/s). [21]
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Common rifle cartridges, from the largest .50 BMG to the smallest .22 Long Rifle with a $1 United States dollar bill in the background as a reference point.. This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name.
The .270 Weatherby Magnum was the first belted magnum based on the .300 H&H Magnum to be developed by Roy Weatherby in 1943. [2] The cartridge is short enough to function in standard-length long actions with a brass length of 2.549" or 64.74mm and an overall length of about 3.295".
The .30-378 Weatherby Magnum is a .30 caliber, belted, bottle-necked rifle cartridge. [2] The cartridge was developed in response to a US Army military contract in 1959. While still unreleased to the public, the cartridge went on to set world records for accuracy including the first ten 10X in 1,000 yards (910 m) benchrest shooting. [ 3 ]