I am going to put together three AR 's for a prairie dog hunt next summer in South Dakota. One is for me, one for my dad and one for my brother. I am trying to decide on caliber. Initially I wanted to do them in .204 Ruger, then I saw the price of ammo compared to .223. I have read the ballistics charts but would like real life opinions from you guys. Once this hunt is over I can safely bet that my brother's and dad's rifles will mostly live in their safes. Where I hunt here in Vermont, 300 yards is the very limit for a woodchuck or crow, closer for coyotes. I have no experiance with the .204. The guide says 1000 rounds a day between the three of us is about right, and we're going for four days. Do you guys think the .204 that much better for essentially a one time thing? Not to sound cheap, but the ammo cost is really my hang up. Thanks for any input.