My area we have just shy of 8 month hunting season and are allowed rimfires. If you can get close enough to them I would use a 22 mag with a heavier bullet, they are not a large animal and the ones we have shot with high velocity centerfires have usually ended in a mess , get them close enough a good shotgun can be pretty good just so long as he is not in your lap shooting distances. We have called them in with hand and old tape callers just have to be patient and call times can vary , they usually are watching you or in your direction long before you see them, i've had them come in while calling and a big male was watching a rabbit as it were walking right out in front and got wacked with a 110 gr sierra HP in 308, what a mess. big cat probably should have let it pass. some of my friends have gone to savage 24's or baikal's over /under shotgun /rifle barrels more so for foxes but also other predators for close in barrel and longer range barrels, my friends use some type of scope mounted, they figure if a fox is close enough you are just going to sight down the barrel anyway at these in your lap distances.