This episode occurs in 1865 because Hardie reads aloud a letter that proclaims the death of President Lincoln. In 1865 hand gun revolvers used black powder and were ball and cap weapons. Hardie's revolver belt contains cartridge bullets which were unavailable at that time and era. Edit: True. The weapons used were Colt 1873 SAA revolvers, Winchester '92 lever action rifles and a 1873 Springfield trap door carbine. All anachronistic for this time period April 14, 1865.