Hello! For both cartridges (416 Rigby and 458 Lott) a lot of components are available , prices are similar and, in this caliber, no cheap ! I think the cartridge 416 Rigby is easer to reload. The shell of the Lott is straight with a light conical shape, a reason for a lot of problems by reloading! But, for hunting Big Game. it is better to use the caliber .458 !