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The .375 Weatherby Magnum was designed by Roy Weatherby in South Gate, California, in 1944 and put into production in 1945. The original cases were fire formed from .300 H&H Magnum Winchester brass, then from Richard Speer's 300 Weatherby brass [3] before finally settling with Norma as a source for cases.
The .378 Weatherby Magnum was designed by Roy Weatherby in 1953. [3] [4] Although inspired by the .416 Rigby, it is an original belted magnum design with no parent case. [5]The cartridge features a high powder capacity relative to its bore size, and can hold upwards of 7.13 g (120 gr) of powder.
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 shootin
Case capacity: 82.8 gr H 2 O (5.37 ... The Kodiak is an improved cartridge based on the .375 H&H Magnum that is similar to the .375 Weatherby Magnum. Performance with ...
Overbore cartridges are those with a relatively large case volume or case capacity, ... .375 Holland & Holland Magnum: 6.18: 0.7016: 8.81 ... .257 Weatherby Magnum: 5 ...
The .375 Weatherby Magnum is an improved case like the .375 H&H Ackley Improved. The case was designed by Roy Weatherby in 1944 and features the Weatherby double radius shoulder typical of all Weatherby cartridges. The .375 Weatherby Magnum is capable of launching a 300 gr (19 g) at 2,800 ft/s (850 m/s).
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).
Case capacity: 4.43 cm 3 (68.4 ... slightly more capacity than the 240 Weatherby Magnum, ... - necked up to accept a .375 bullet - Also known as the 375 Whelen, this ...