It depends on if you are on level ground or not. If there is a slope you are shooting into, the distance will be more true. If you are shooting down a slope, the distance will get a little farther. Generally speaking though, you are going to shoot high out of a treestand if you are on level terrain. That 20 yard shot is going to be a 20 yard shot. Remember, "a" squared + "b" squared= "c" squared. That 35 yard shot will be about 35.3 yards. 12 feet in a tree doesn't mess with the distance too much. Just remember this can be greater if shooting down a slope because your elevationfrom the deer will increase. In most cases though, the distance will not change that much. Remember to bend at the waist when shooting for better accuracy as well. Good luck!