Bruce,
In my experience the 9.3x62 is indeed more "inherently accurate" than the .35 Whelen--and that's not just my opinion but that of one well-known accuracy gunsmith. Exactly that should be so is a mystery, but he often compares the 9.3x62 to a "big .308." They're that easy to get to shoot really small groups.
However, the other side of all this is exactly how small groups have to be in order to kill big game, especially BIGGER big game at, say, 300 yards, or even 400. Not many hunters chose either round for shooting beyond 400!
Maybe the anemic twist rate of 1:16 on factory Whelen rifles has something to do with that? My 1:12 Whelen was easy to get great groups with.
