I would get a 243, they are accurate. they have many different bullets in factory-reloading. I have hunted all my life with various 30 cals and I tell you what, they are to much gun for deer in the 100-200 lb range. and the best thing about the 243 is the recoil is very mild compared to every other 30 cal. And they are fun to shoot!!
That being said the 243 is not the best choise for the larger deer species like elk or brown bear, but for every thing else this is the perfect gun.