Real deer not 3D targets! 3D targets don't duck or start running away.
Just answer the question, is it more likely that a deer can react at 40 or 50 than 20?
Whoa, slow down there cowboy. You asked me to give you some FACTS as to why my arrow was going to land in the chest cavity at 40-50 yards and I provided said facts. You then ask about reaction times. One point at a time. I provided you with the facts that you asked for, now please provide me with the factual information that the probability of me wounding a deer is 50% greater by taking a 40 yard shot. After all we are talking facts not opinions so I'm sure you're going to be happy to divulge your source to me on this issue. We shall get into the reaction times of deer after we finish with your 1st point.