A 223 is a great gun. My experience is that it's not as fur friendly on fox, but is excellent for coyotes. The right bullet would help though. I just never played around with mine for predator hunting. I mainly use it for deer, and love the results from it. It's amazing the performance these little guns do on deer and there is not really any recoil. Brass is cheap! You can't go wrong with this caliber in my opinion. I ripped some big holes in foxes with it, but I shot all of them with my deer hunting loads. My fault.