I recently learned that a distant cousin arrowed a deer at 60 yards. I initially called BS (not so bluntly), but his mom swears that he has witnesses.
60 yards seems tough to me. Not tough in the respect of your arrow going where you were aiming, but in the respect of the deer still being there when the arrow arrives. If they can jump/duck a shot at 20 yards they should be able to hop-scotch around the arrow at 60.
I have never needed to shoot outside of 25 yet, but tell myself that if a perfect situation presented itself, I'd go 40 MAX!