Tim hits most of the meat of the subject in his post. Also, for the distances you have available. Buy a good 22LR and use that to practice everything but recoil control. It will pay for itself 10 times over in saved ammo costs over running the big rifles. Plus shooting out the 200 with a 22, is like shooting out to 500 or so with a larger rifle. It's exceedingly good for learning wind calling, and positional shooting.