My guess is that from a performance view on game-- you will not be able to tell a difference. However. living here in Ohio--buy the .338 WM. Here in the buckeye state and even in Alaska finding ammo for a 9.3 x 62 will be about impossible. Heck-- In Columbus, you would not even be able to buy cases or bullets from a store. All componets would be internet or special order only from a retailer. I think that it would be about the same in most areas of the USA. With the .338, you can buy ammo or componets just about anywhere.