Definitely a cool cartridge...
Just not sure a dangerous game rifle in a short action gains much...slightly shorter bolt throw and stiffer action being the best gains. Weight savings often sought by mountain hunters, not typically a factor for big bores where extra rifle weight aids in reducing felt recoil and muzzle jump. Short fat cartridges can feed well, but will not feed as smoothly as the older longer cases with more taper. All the main topics people like to banter over with drinks around the campfire! (or online! LOL)
I know I went with the 416 Taylor as it was definitely easier to find a left hand donor rifle, in a standard length action, was a SAAMI cartridge with properly headstamped brass available, and had the cool factor that there aren't as many out there. Do not get me wrong...a LH 416 Rigby would be very cool, and a LH 416 Rem is possible, but again a LH action of sufficient length is not as easily found. And my first rifle in 416 Taylor was a Ralf Martini build on a RH Ruger 77 and was a great rifle that consistently shot clover leaf groups with open sights, and I wanted a mirror image rifle after that!