I think it depends on which authors you read as a child. I grew up on books and articles about Africa so the 9.3x62 is the way I went. Looking at the above bullet list it is obvious if you want to shoot heavier bullets go with the 9.3 round. I would imagine if you want to also plink or shoot smaller game the Whelen has the advantage of pistol bullets and a better selection of bullet molds for it too. I would think if I found a rifle I like in either caliber I would go with that one
