 For this reason several rifles which were formerly chambered for cartridge like the .375 H&H Magnum and the .458 Winchester Magnum were easily converted to the .458 Lott early on when .458 Lott rifles were only available as a custom offering.These conversions required no more than a re-boring or a re-barreling and perhaps a magazine extension if required.The Mauser style action has long been favored by African hunters.