Let's hear it for the 416 Rigby!
Every 416 cartridge measures itself against the 416 Rigby and they all strive to equal or better it, although none of them has made any advance of any significance. The fact that the 416 Rigby is still going strong after 98 years speaks for itself.
This is a cartridge that has it all: reliability, punch, reliability, accuracy, reliability, pedigree, reliability, low-pressure. The recoil is a shove, which is easy to absorb, rather than the hard punch that the other 416's give.
416 Rigby ammunition is loaded by a good range of manufacturers and there are plenty of formulae available for the hand-loading enthusiast. You'll also have a better chance of picking up 416 Rigby ammunition in the more obscure parts of Africa.
When hunting Dangerous Game, the number one priority is reliability and this gives the 416 Rigby an unreachable edge the other contenders. It just will not let you down.
416 Weatherby? - Brutal to handle and unnecessarily fast. 416 Remington? - Bigger recoil and only marginally greater speed claimed. 416 Dakota? - Bigger recoil, marginal greater speed claimed. 416 various wildcats? - Virtually identical balistics and no pedigree.
I think that whether you are hunting Lion, Elephant or Buffalo, a 416 Rigby with a Mauser action is without doubt the best of the 416 stable. It will not leave you holding a jammed gum while you stare at the approaching enraged beast. It's also a great single safari rifle because it will reach out and take smaller game with accuracy. I have a 416 Rigby which I had made by W Jeffery; it is a great gun. Let's hear it for the 416 Rigby