This would seem a pointless discussion with the modern powders available. The 458WM is now easily capable of 2150fps with a 500gr soft, without compressing charges. Even 2200fps is reasonable with appropriate powders and lightly compressed loads. The 500gr bullet SD of a 0.458 is greater then the SD of the 0.474. Why would anyone be concerned about the caliber's "ability" to take dangerous game? People need to understand the limits of the cartridge's past are no longer an issue in today's technology. Get on the sticks, practice, practice, practice until you can't get the shot wrong and do your thing in the field...