The 458 Lott was originated by Jack Lott in 1971. It is based on the blown out and shortened 375 H&H; Magnum case. It is 3/10-inch longer then the 458 Winchester Magnum case. The purpose of the slightly longer case was to improve 458 Winchester performances with the 500-grain bullet for use in Africa against dangerous game. It has been field-tested in Africa and has chalked up an impressive number of one-shot kills on elephants and buffalo. Rifles chambered for the 458 Lott will also safely shoot 458 Winchester ammo. 

This text is based on information from “Cartridges of the World”, Hodgdon reloading manual, the cartridge designer and/or own resources.