Every hunter needs to know their limitations. I've seen far too many instances where a poorly placed shot with a .243 just caused an injured deer to run off, not be tracked correctly, and die. Now, I've seen the same thing with a 7mm Rem Mag., so it's not so much caliber, but "buck fever."
I don't disapprove of the .243 for hunting, I hunt with an old man who has never had a running kill with one, but he's never missed the brain with it, either. I guess being a sniper in 'Nam helps him out there.
I didn't take your comment as a "run" on me, I just don't understand how certain calibers are deemed "OK," while others, that make more sense for thin-skinned game are banned. Length of average shot, maybe?
ft-lbs at 100 yards? I don't know how to come up with the "OK" rounds, no matter what it not going to meet everyone's definition. Didn't some judge say: " I can't define pornagraphy, but i know it when I see it", are we left with , I can't define a humane round but I know it when I see it?