This is approximately 25% more energy generated than the 30-06 Springfield. Typical velocities for these bullet weights range from 2,960 ft/s (900 m/s) for the 200 gr (13 g) to about 2,660 ft/s (810 m/s) for the 250 gr (16 g) bullet each generating approximately 3,900 ft⋅lbf (5,300 J) of energy. 338 Winchester Magnum is capable of launching heavier bullets than the. Bullets are available in a very wide range of designs and weights ranging from 150 to 300 grains. 30-06 Springfield's energy values at muzzle. This cartridge is able to push a 225-grain (14.6 g) bullet to velocities of 2,800 ft/s (850 m/s), generating 3,918 ft⋅lbf (5,312 J), providing energy values at 200 yards that are roughly equivalent to the. The CIP enforces a 4,300-bar (62,000 psi) pressure limit for the cartridge. The SAAMI-recommended average pressure for the cartridge is 64,000 psi (4,400 bar). 338 in (8.6 mm), with each groove having a width of. 330 in (8.4 mm) and a groove diameter of Ø of. SAAMI and the CIP recommend a 6-groove barrel with a twist rate of one revolution in 10 in (250 mm) of barrel length with a bore Ø of. 270 Weatherby Magnum and the 7 mm Weatherby Magnum for which Winchester had supplied basic brass until 1948.īoth the Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives(CIP) and the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI) govern and regulate the specifications regarding the. The cartridge follows the design of the standard length Weatherby Magnum cartridges such as the. The case has a capacity of 86.0 grain of H 2O (5.58 cm 3). 375 H&H Magnum, which was shortened to 2.500 in (63.5 mm), blown out and necked down to hold a. 338 Winchester Magnum follows the modern cartridge designs in that the cartridge case features a case with minimal taper so as to maximize case capacity yet providing reliable feeding and extraction. This chambering left little doubt that the cartridge was intended for big heavy dangerous game. Sometime later, Winchester introduced the Winchester Model 70 Alaskan chambered for the cartridge. 375 H&H Magnum case blown out and shortened to 2.500 in (63.5 mm), much like the. 458 Winchester Magnum, all of which used a common case design based on the. 338 Winchester Magnum was introduced in 1958 together with the. 375 H&H Magnum necked down to accept the same bullets. 30-06 Springfield case necked up to accept. O'Neil, Keith and Hopkins experiments led to the creation of the. 333 in (8.5 mm) were available in heavier weights than the. 338 in (8.6 mm) diameter bullets used in cartridges such as the. 33 caliber bullets which were more common than the. 333 in (8.5 mm) bullets may seem odd today but at the time this was the standard diameter of European. 338 Winchester Magnum traces its heritage to the experiments conducted by Charles O'Neil, Elmer Keith and Don Hopkins with cartridges firing. The cartridge was intended for larger North American big-game species and has found use as for the hunting of thin-skinned African plains-game species. 30-06, and most major rifle manufacturers in the United States chamber rifles for the cartridge including the semi-automatic Browning BAR Mk II Safari, making it a very powerful combination against charging dangerous game. It is also the most popular medium-bore cartridge in North America and has the most widely available choice in rifles among medium bore rifles. 338 Winchester Magnum is the first choice among professional brown bear (specifically grizzly bear) guides in Alaska to back up clients where a powerful stopping caliber is required on charging bears. 338 in (8.6 mm) is the caliber at which medium-bore cartridges are considered to begin. 338 in (8.6 mm) caliber, belted, rimless, bottlenecked cartridge introduced in 1958 by Winchester Repeating Arms. 338 Winchester Magnum (Right) US Quarter for scale
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