I have a 243 ,6mm rem and 25-06 rem. the 243 is a deadly round to a deer! i have a little youth 700 my son has taken many with. but he jumped up to my 25-06 this year shooting 120 gr sierras. a good buck ran farther than any he ever killed with a 243 and it was excellent shot placement.
I have tracked them long distances with alot of calibers being the weapon . one that was hit with a 45-70 in the chest ran some 150 yards! and i have seen them hit with a 243 in the base of the neck and fold up!
shot placement!

If you want a 243 get one or try something else . just be good with whatever you get.