Hi folks, need an answer for something I don't know much about. I am suppose to go with my wife's uncle to get rid of some coyotes that are bothering his friends farm. My question for you guys is what rifle should I use? The choices I have been given are a .243, a .270, and a 7mm rem. mag. I have shot all three before(not these particular guns but the caliber). I target shoot but don't hunt so I don't know which to use. Thanks for your help.