I have a friend whose dad had a .20-20 single shot bolt action winchester rifle. The dad got into drugs and sold the rifle. My friend was five years old then. He wants a 20-20 now. His mom says it was a centerfire. At a gun show here it took four guys six hours to find this gun in books. It was made in the 1910's in single shot and later a repeater. Most expensive value for the single shot was listed as $2500 . My friend did not notice the model number nor what book the info was in. My Cartridges of the World Book, Flayderman's, or Catalog of Firearms show nothing. I would appreciate any help on the 20-20 rifle. I only have a 5mm rimfire in a .20 cal rifle. Maybe I need a .20-20 rifle. I know I do not have one.