I usually don't pay much attention to these types of articles but IMO when asking about the cartridge itself (not a particular factory load) you would have trouble beating the .458Win or Lott (or 450NE too).

First, handloaded, they can properly kill any animal on Earth from rabbits to elephant.

Any power load from the 455Webley to 450NE is possible with different reloading techniques.
Solids, softs, cast of all weights and even home made bullets like mine made from 45acp brass make the .458 class cartridges quite versatile.