Welcome aboard R eight. Glad that you've already "met" some of our Aussie friends. Apart from the good natured ribbing I can confidently say that the knowledge the collective "we" possess re. firearms, hunting and shooting can't be matched anywhere. Since you are thinking about a 416 Rigby you obviously own a few other calibers. What are they and what have you taken with them?
G'day Mate. I bought my 416 Rigby a couple of weeks ago....still waiting for the permit to collect it.

So I've not hunted with a 416 Rigby yet.
Other calibers that I currently own in hunting rifles... 308 win, 375H&H, 300 Win Mag, 9.3x62, 223, 30/06 and of course .22 LR.
Rifle makes owned. Blaser R8's, Rigby's, FN Mauser, Winchester '95, Rem 700, Sako Finlight, CZ, and a Tikka T3.
Hunting that I have done....
Australia. Water buff, scrub bulls, brumbies, donkeys, pigs, dingoes, goats, red deer, sambar and that's about it.
NZ....thar, chamois, red, goats, whitetail.
Alaska/Nth America..... Brown bear, Dall sheep, BG caribou and got a moose hunt booked for BC in 2022...covid pending . Got 2 unused tags for Alaskan moose.
Up coming hunts:
Africa after elephant and buff.
NZ chamois and whitetail. Ducks/geese.
Australia: sambar, Bantang, and maybe one day hog deer and another buff. And of course pigs, pigs and more pigs.
North America: another sheep or brown bear. If any money left and I can still climb hills.
Additional rifle purchases ? NONE

well maybe ......just one more. But seriously I got every hunting situation covered. Time to spend more time and money hunting.