You hear people every year talk about the trophy that was wounded and never recovered and they are willing to blame everything but themselves for wounding the animal. "Damn 243 won't kill deer, if I was shooting a 30-06 or 300 Mag I would have gotten him!" My point is "no buddy, if you would have made a good shot on the deer you would have gotten him!"
Larger caliber guns do not make up for bad marksmanship!
Perhaps they need to give hunters markmanship classes or have you pass a proficiency test before going hunting. I would be in favor of that. Yes there are a lot of "Magnum" shooters that think they will make up for a lousy shot with a hit anywhere on the body but all a magnum does is increase range, But there is no denying that a bigger ,heavier projectile going faster is going to do more damage then a "Pop" gun and at extended ranges.Big Animals require Big Bullets especially when the conditions are bad, the animal is at an angle etc etc etc.