I practice at 20 to 30 consistantly and have come to understand that my 20 yard pin is good for any distance below that with a slight adjustment when up high say 15 to 20 feet up. I aim a little low to compinsate for the deer droping and the harder angle when they are 10 yards from the base of my tree or less. If I can't keep my form when I bend I choose not to take the shot if they are simply to close. I shot a Doe at between 25 and 30 yards last year using my 30 yard pin,it entered a little high but exited perfect taking out the liver first then the left lung I was 15 feet up. If this is not good advice feel free to correct me some of you that have better skills than myself. I have a range finder and I shoot distances before I settle in for my hunt,this is because as has been said you don't always have time to use it.