Imo although the 450/400 is a good Elephant caliber it is not as good as say 470NE or 500NE for stoping a charge.
Imo a PH that hunts Ele often is best armed with the latter.
I am a sports hunter that requires a more precise first shot and a scope is often required and although I can use my 470 well it will be replaced by a lighter 450/400J with a detachable scope for more flexibility, ie cats and Hyena on twilight and small game.
ozhunter