last post is exactly like me and my dad. He never cleaned his guns and killed a ton of deer, about every 5th or 6th deer he would start missing them. We'd check his sights out and theyre loyabl to be 2 feet off sights (scope) Id sight it back in and he'd be good for 5-6 more years. But he also missed way more deer than I ever shot at! his might be shot in the leg, head, shoulder or butt. About 18 out of 20 of mine were shot in head not to mention if they were way out there he would shoot at them only to scare them away.