Here in WV, I hunt in small fields and in the woods so my shots are closer. I can have a coyote, fox or bobcat come in to a set so I was looking for a fur friendly bullet for something as small as a gray fox but capable of killing a coyote. A 50 gr Vmax in my .223 has done great. I've never had an exit wound on coyotes or foxes. Can't recall the velocity but I have a 1:7 twist Noveske barrel. Shoots great even with the fast twist. Benchmark powder. Don't recall how much.
Now that the coyotes have pretty much decimated our fox population, I quit shooting foxes. I just bought a box of 60 gr Vmax to try.