A 243 would be a good choice with plenty of longer range capabilities. If you are going to be hunting in very windy conditions, with long range shooting, you may wish to go to something that handles a heavier bullet than the 243. Many.many choices then, mine woulde be the 270
One of the most important pieces of equipment that you will take hunting is a good quality pair of optics and they take some care to give you the performance that you want. So here are a few tips.
Use some alcohol and cheese cloth to clean the lenses. I will usually pick up an extra cleaning kit from my optician when I have my eyes examined.
Don't touch the lens with your fingers. If there is a stick or a bug on them blow it off.
Use the lens covers. They are there...