I am a smallbore nut and have guns chambered in 17 Rem, 223, 22-250, 220 Swift, and a 243. The caliber that gets the most use is the 223. I do a lot of calling and have taken coyotes anywher from 10 yards to 250 yards with my 223's. They are the cheapest to shoot too. The 22-250 and the Swift will shoot further but even out here in Wyoming, I seldom shoot farther than 100 yards. I have carried my Colt and my Bushmaster more than any other gun in my safe. I will say this though. If you are talking prarie dogs, I do use the 22-250 and the Swift for them because I get 3 to 400 yard (and longer) shots and need the extra range. But if you are calling Coyotes and foxes into reasonable range, you'll be more than happy with the 223. I went out today and took 2 more song dogs with my Bushmaster. They never complained about using too little gun on them. :wink: