0Re-design 11 years ago It takes practice. Try to set up the rubber band on your fingersthe same way each time. Try to hold your hand the same way each time.It's an estimation experiment each time you shoot. If you're hitting too high lower your aim. If you're hitting too low aimhigher next time.After a few hundred shots you'll know where your next shot is going to go.Good luck and don't put out anyone's eye.