I found this funny Deer Hunting video on YouTube. If you watch where the bullets are impacting you can tell that they shooter is looking at the Bucks antlers, not concentrating on where his crosshairs are.
Either that, or he didn't sight in his Deer rifle. Could be a case of a Magnum owner having someone else sight in his rifle because he's afraid of the recoil. Regardless, this funny video demonstrates the need for practice with your Deer rifle!