22 LR
9 mm
12 Gauge
Anyone who doesn't chose those 3 is wrong, so that basically leaves you with one choice and then you have to decide if you want to hunt all big game with a .223 which is probably the best choice, argument could be made for .308, 30-06, 300WM or 6.5 Creed.
I'd be curious to know why he used a radius shoulder.
To the author you don't hear impacts from over 2 miles away. I do supposed that thing's got a fair bit more energy than my 375
buy once cry once.
save your pennies until you can get the item you want, other wise you end up buying a "good enough" version and still want the original then it costs even more in the long run.