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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).
This is due to Weatherby's (Norma) factory loaded ammunition using Hornady's DGS and DGX bullets which have identical G1 ballistic coefficients of .295. The ability of the .460 Weatherby to carry the energy and velocity required to take heavy, tough skinned dangerous game combined with the flatter trajectories it provides, gives the shooter the ...
As the .375 Weatherby is an improved cartridge, .375 H&H Magnum ammunition can be fired in .375 Weatherby chambers with a slight loss in performance of the .375 H&H ammunition. Cases thus fired are in essence fire formed to the Weatherby cartridge's dimensions and if reloaded should be reloaded using .375 Weatherby reloading data.
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.
This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name. Data values are the highest found for the cartridge, and might not occur in the same load (e.g. the highest muzzle energy might not be in the same load as the highest muzzle velocity, since the bullet weights can differ between loads).
.224 Weatherby Magnum maximum C.I.P. cartridge dimensions. All sizes in millimeters (mm) plus Imperial (inches). The .224 Weatherby Magnum (5.56×49mmB) is a sporting cartridge that Weatherby introduced in 1963. The chambering was discontinued in 1994 and reintroduced in 2025. It is the only belted magnum varmint cartridge. [2]
The .30-378 Weatherby Magnum is a long range cartridge. It is the most powerful - in terms of energy - .30 caliber production cartridge available. [7] It is also the flattest-shooting .30 caliber factory ammunition available. Dependent on the ammunition chosen the cartridge has a maximum point blank range of over 400 yd (370 m).
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 .375 H&H Magnum can be fired in the chamber of a .375 Weatherby Magnum with a slight loss in performance.