I have a model 12 BB with Leupold mounts. I mounted a Weaver Grand Slam on it and I can't get the scope far enough back. The scope is only 11 inches long. I get a big black ring at higher power. This really reduces the field of view. My eye is just too far away from the scope. I can't figure any other way to get the scope back far enough except to put a pic rail on the gun. But I fear if I do that the rail may run into the front of the scope when I take the scope back far enough. I'm really stumped here. I welcome any suggestions and advice.

What I would like to know is if the experts here think a pic rail will work out.