With good 100gr. hunting bullets, the .243/6MM is as good a MINIMUM deer caliber/cartridge as it gets!
I have always subscribed to the theory that you can't be over-gunned! But the real truth is if your bullet is not matched to the game being hunted, bigger IS NOT always better!
Use a heavy magnum with the wrong bullets and you might as well be hunting with FMJ's! Dead animal, no blood trail!
I have never had that problem with the .243/6MM!