Did Remington ever make a shot barrel in the model 512 Sportsmaster? .. Either they did, or the one I have is shot out completely... I don't think I've ever seen a rifle worn so bad... or so filled with lead...????... or what ever ... got any ideas anyone? The barrel is marked on the breech end with an "x45" on one side... and an "eyy" on the other. No serial # of course.