That White 12 gauge will out shoot any modern 12 gauge for range. I shoot a Knight TK2000 12 gauge and its good ... easy to 40 yards for me. But there is a documented case I read about, verified by his hunting partner 62 yards and he killed a turkey. For a shotgun.. that is a long long shot.
That sure is a nice rifle you have there. I bet you can't wait to shoot it. Don't let them short barrels fool you. My Model 97 Whitetail Hunter in .451 is a real shooter. And all I use is a 2-7x32mm 3200 Busnell Elite scope.