We had a Fox under a deck years back, running around trying to bite folks in a neighborhood. We had it cornered pretty good, and thought a sub-sonic to the neck from close range would do the trick. I don't recall how many my friend put into that Fox, but enough that he threw the sub Sonics in the garbage, and used the 835 to dispatch it. They may have a use, but I have better luck dispatching with my RWS .177 .