I would take the shot if the deer was within 20 yards after that their starts to be to much time for error. Deer could jump the string or take a couple steps in the time you release to the time of impact. Anything after 20 yards I will stop them while I am at full draw and then give it to them. Had one deer jump the string once at 30 yards and luckily I got the artery that is up by the spine that runs the length of the deer. Bow limb hit the tree limb upon release and the deer didnt like that noise I was taking a shot behind my stand.