I would do 9.3x62, 35 Whelan, 338-06, or 318 Westley Richards. I have all but 338-06 but I load my 338 Win Mag to 338-06 level.
The 318 is a pet project of mine but does present a challenge with dies, bullets, brass, etc. The 9.3x62 is my favorite of the 3 and seems to punch well above its...