It's one reason isagree with the small bore fans using 24 and 25 caliber's on game up to elk.
So a .24 or .25 caliber is ok for game bigger than elk? Just kidding you Don, but I have to respectfully disagree with you on at least part of your statement.
I continue to hear the .243 bad mouthed for deer sized game. I guess your experience is different than mine but I've never lost a deer with it and only had 2 run out of the 50 or more I've killed with it.
Granted, our Tennessee deer arn't near a big as our northern neighbors, and maybe this is why I haven't seen a failure. Or, maybe it was the 1000's of rounds I shot while working up loads.....or maybe is was the hundreds of groundhogs and crows that I practiced on.
I would probably agree that elk are larger than what ought to be shot with a .243, but I don't have any experience with elk and not qualified to give a definate answer.
That said, in my experience, the .243 is a fine deer round. Are there better choices? Sure, depending on the situation.