at 20 feet, thats not very far. I mostly like to have them within 1 or 2 inches at 30 yards, and ive robin hooded fletched shafts with bare shafts at 20. They need to be farely close. If they're within an inch or two, i would think that would be ok, that could just be your form showing. Try and get them to actually group with your other arrows though. Then they is pewfect!!!!