The.460 Weatherby Magnum is a belted, bottlenecked rifle cartridge, developed by Roy Weatherby in 1957. The cartridge is based on the.378 Weatherby Magnum necked up to accept the. 458-inch bullet, the original.378 Weatherby Magnum parent case was inspired by the.416 Rigby. The.460 Weatherby Magnum was designed as an African dangerous game cartridge for the hunting of heavy. However handloaders can push the cartridge to generate as much as 15,000 foot-pounds of energy in a bolt action. However, doing so necessitates a rifle so heavy it is almost inoperable for hunting purposes, the.700 Nitro Express was itself eclipsed in only five years by the 1993 introduction by A-Square of the.577 Tyrannosaur. The.577 T-Rex develops approximately 10,180 foot-pounds force with a velocity of 2,460 ft/s, the.460 will launch a 500-grain bullet at a chronographed velocity of 2,700 ft/s from a 26-inch barrel, measuring 8,100 ft·lbf of muzzle energy. Prior to the arrival of the.460 Weatherby Magnum on the hunting scene, Roy Weatherby had expected that the. Furthermore, new regulations prohibiting the hunting of heavy, thick skinned and these regulations would essentially ban the use of all previous Weatherby cartridges for the hunting of elephant, African Cape buffalo and rhinoceros.40 caliber rifles. He accomplished this by necking up the.378 Weatherby Magnum case to accept a.458 caliber bullet and he named the new cartridge the.460 Weatherby Magnum. The first rifles for the.460 Weatherby Magnum were built on Brevex Magnum Mauser action, however, Roy Weatherby was not the first cartridge designer to neck up the.378 Weatherby Magnum to.45 caliber. That distinction belongs to John Buhmiller, a gunsmith and hunter from Montana, Buhmiller named his cartridge the.45 Weatherby. He had success with the cartridge in Africa shooting Cape buffalo and rogue elephants in 1956, Norma Precision of Sweden was the first and only manufacturer of.460 Weatherby Magnum cases and ammunition which carried the Weatherby name and has done so under contract from Weatherby. During Weatherby’s partnership with J. P. Sauer/Dynamit-Nobel, production at Norma ceased and shifted to RWS, a wholly owned subsidiary of Dynamit-Nobel. However, RWS did not tool up in time to produce the.460 Weatherby Magnum cartridge, DuPont at one time shipped DuPont No.4350 powder to Norma Projektilfabrik for the reloading of Weatherby ammunition. But some time later Norma was able to source a powder with similar burn characteristics locally which was used instead of DuPonts IMR4350, Norma would later purchase the company and rename the powder Norma 204. The.460 Weatherby Magnum case uses a necked up.378 Weatherby Magnum case. Although the.378 Weatherby Magnum case was inspired by the.416 Rigby case, the.460 Weatherby Magnum requires a case with the large propellant capacity necessary to propel a 500 gr bullet at 2,700 ft/s. To accomplish this goal, the cartridge case has a capacity able to hold 141.1 gr. of water
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460 Weatherby Magnum dies by RCBS.
.460 Weatherby Magnum SAAMI cartridge dimensions - all dimensions in inches (mm)
.460 Weatherby Magnum SAAMI chamber dimensions - all dimensions in inches (mm)