 Furthermore, as the Lott cartridge is in essence a lengthened .458 Winchester Magnum, converting a .458 Winchester Magnum to .458 Lott involves in many cases a simple re-boring of the chamber and if required, a lengthening of the magazine.The .458 Lott was standardized by SAAMI in 1995 based on specification provided by Arthur Alphin and A-Square LLC.According to Arthur Alphin, the cartridge length was standardized at and the chamber length at because there were many converted rifles in the field that were chambered for the original Jack Lott length.