Jack Lott designed the 458 Lott Ammo. He had an adverse encounter in Mozambique with a buffalo where he suffered some injuries. This incident made him believe that ammo more powerful than the 458 Winchester ammo he was hunting with was vital for dangerous games. He wanted ammo that could drive a 510-grain bullet at 2150 fps at moderate muzzle pressure. When he couldn’t find one that fit the bill, he chose to design one of his own.
The designs of the 458 Lott Ammo were on a paper diner napkin. The plan maintained most of the features of the .458 Winchester Magnum. However, he solved the case capacity issue by extending the case length from 2500 inches to 2850 inches. However, during experimentation, the case ended up at 2800 inches. With the new case capacity, the .458 Lott could drive a 500-grain bullet to a muzzle velocity of 2300 fps and 2570 foot-pounds energy.
The .458 Lott Ammo can also achieve a muzzle velocity of 2150 fps with a 600-grain bullet. This performance is far higher than that of the .458 Winchester it replaces. It also provides superior penetration, which makes it an excellent fit for hunting dangerous games. It also features a tapered case that offers exceptional flexibility in reloading to lower muzzle velocities.
The ability to reload to a lower velocity provides shooters with ammunition that has less recoil. Therefore, the .458 Lott Ammo is versatile because it works well for hunting small to medium games and is also a perfect fit when you’re hunting dangerous games like the African Buffalo and Alaskan brown bear.
Roy Weatherby designed the 460 Weatherby Magnum, a belted, bottlenecked rifle cartridge, in 1958. It's based on a.378 Weatherby Magnum that's been necked up to take a.458-inch (11.6 mm) bullet. The.460 Weatherby Magnum was developed as an African hazardous game rifle cartridge for hunting large, thick-skinned dangerous species in Africa. The Sporting Arms and Ammunition Manufacturers' Institute (SAAMI) published voluntary standards for the cartridge in January 1994, hence it is not considered a proprietary cartridge.
The 460 Weatherby Magnum case is made from a necked up.378 Weatherby Magnum case. Although the.378 Weatherby Magnum case was influenced by the.416 Rigby case, it is regarded as a one-of-a-kind case that has served as the parent cartridge for various high-performance cartridges. The.460 Weatherby Magnum requires a large propellant capacity in order to propel a 500 gr (32 g) bullet at 2,700 ft/s (820 m/s).
The.460 Weatherby Magnum is intended to have headspace on its belt. Because of their tight chamber tolerance, they headspace on the belt rather than the shoulder, as opposed to most current belted cartridges, which headspace on the shoulder regardless of the belt.
Although the 460 Weatherby Magnum is a powerful cartridge, it cannot compensate for inexperience or bad aim. Harvesting bison, elk, moose, and brown bear can be performed by lowering the cartridge's performance to meet the criteria. The.460 Weatherby Magnum cartridge may be loaded to perform similarly to the.45-70 Government and the.450 Rigby. The much-decreased recoil of such loadings is a benefit.
