Practice the shot and make sure you also practice it from an elevated platform if you hunt from trees. It's a touchy area. At slam dunk, you won't be shooting high, you'll be shooting low. Look at the distance between your sight pins and your arrow rest. Your arrow archs. Close up you will shoot LOW with your 20 yard pin. It usually gets close with most bows at 13-15 yards... but at 5 or 10, you'll shoot TOO low with 20. Straight down it's really bad. Depending on your form... and YOU BETTER PRACTICE IT... many people use a 30 yard pin to shoot straight down. Don't believe me... try it. But back to the 10-20- whatever. All bows and all forms and people are not the same. You must shoot it to see.