I always use a shotgun for fox (just because I lost one last year). It's to hard for me to keep the crosshairs on them when they do that start and stop to the call. I would has lost a chance on my second fox this year because it appeared and was already with in 10 yards. I turned and it ran so I waited for it to hit the opening and I shot it at 25 yards. However since I got some new places to hunt this year that have coyotes I will be taking my 223. and set up for a longer shot. I'm just waiting for everything to be perfect before I hit these spots. Full moon gone,high winds gone no rain and I'm there.