If it weren't would you pass on it? Would anyone? I wouldn't, it is still a good buck whether it is in some book or not. I guess if you are shooting deer to get in some book then the question is important but if you are hunting deer to please yourself then it wouldn't matter.

What if you estimated that same deer at 35 yards and he was at the 43 yards and your arrow went under him, would you use a rangefinder next time out?