Instead, use a Good Will Hunting Cam. Designed with realism in mind, it looks like a real gun. In fact, it is a real gun. But it only shoots blanks. The secret lies in the trigger. When the trigger is pulled, a camera attached to the barrel, or imbedded in the scope is triggered. The cam takes a picture, with crosshairs to show where the bullet would have hit.

Now, not only can you claim to have shot a twelve-point buck, but the deer goes free, and you have pictures to prove it!