https://www.americanrifleman.org/content/the-458-lott-a-dedicated-cartridge-for-dangerous-game/In 2002, Hornady and Ruger teamed up to legitimize Jacque P. Lott’s wildcat cartridge—one that delivers more velocity, energy (and recoil) than the .458 Winchester Magnum.
Jacque Lott was badly mauled by a cape buffalo he had shot with his 458 WinMag. After recovering from his injuries, he set about designing a more potent cartridge that would be more effective on dangerous game - hence the 458 Lott. The early 458 WinMag loads did not live up to the advertised performance due to a combination of African heat and compressed powder in the shorter case. Later, Winchester successfully addressed the problem with improved powders.
T.S.
