Jeeez I live in texas and 90% of our deer dont go over a 150 lbs. If you wound our deer with a .243 your a moron and doubt you could do any better with any caliber.
Even my kids never wounded one with a .243. They've made 200 yd shots at the the age of 8 using the .243.
We have been using a .243 since the late 60's, my dad switched from a .308 because of us kids and he never looked back, between me my brother and my father and our kids we killed 100's of deer with it and havent had one single problem. Thats almost 50 years of using a .243.
If you wound a deer with a .243 your probably aiming at brown.