One of the resposibilities of an adult is to help their children along with good judgement. When a 6.5 sits in the arsenal, the use of the 243 simply doesn't show the best judgement, or respect for the animal.
Never said you could not kill a moose with a 243. But....you will never convince me that the 243 will wound and lose more moose than more appropriate stuff.
I absolutley admit to a bias towards more caliber. I used a 270 for many years before trialing a 35 Whelen. The effectiveness of the Whelen, on game, impressed me, even tho the 270 has never disappointed me.
Most of the boys growing up on the (Pennsy) farm began deer hunting with a 35 Remington. I believe that experience taught some important lessons. Not sure some of you fellows would understand just what they might be.
Realize this got completely off track from the original question. For that, I apologize.

Imagine your grave on a windy winter night. You've been dead for 70 years.
It's been 50 since a visitor last paused at your tombstone.....
Now explain why you're in a pissy mood today.