|  | RUGER 
                OLD  MODEL 
                SINGLE-SIX “MAGNUM ONLY” REVOLVERS PRODUCED 
                1959 - 1962 GENERAL 
                OVERVIEW  The .22 Magnum cartridge
                was introduced by Winchester in 1959.  
                Ruger introduced its Single-Six single action revolver in
                .22 “Magnum Only” around June of that same year.  The Magnum guns had 6-1/2 inch
                barrels, round loading gates, checkered black hard rubber grips,
                and no firing pin groove in the rear of the cylinder. 
                They were roll-marked  
                “RUGER SINGLE-SIX WIN. .22 RF MAG. CAL” in two lines
                on the left side of the cylinder frame.   In early 1960 the Magnum Only guns were also made
                available with varnished walnut grip panels. These Magnum Only guns were
                put in a special serial number range of their own beginning with
                300000 and ending at 340XXX. 
                About March 1961 Ruger began to produce these Magnum Only
                marked guns with an extra .22 caliber cylinder. 
                The extra cylinder, the .22 caliber in this case, had the
                last three digits of the gun’s serial number stamped on its
                front face, close to the cylinder base pin hole.  
                The idea of producing these dual cylinder guns or a
                “convertible” came from customers requesting that Ruger
                retrofit their “Magnum Only” single-cylinder guns with a .22
                caliber cylinder or their .22 caliber only single-cylinder guns
                with a Magnum cylinder. The “Magnum Only” marked
                guns came in a black and red box with a yellow wreath on top
                like the standard Single-Six but designated with Cat. No.“RSSM”
                on the box end labeling.  The production of these
                “Magnum Only” Single-Sixes ended sometime in August –
                September 1962.  The
                6-1/2” barrel length soon was made available in the standard
                “Single-Six .22  Caliber/.22
                Magnum Convertible” model. 
                The boxes for these 6-1/2 inch barrel convertibles
                continued to be marked with the catalog number “RSSM”, not
                RSS6, throughout the Old Model Single-Six production that ended
                in 1972. There are several rare or
                scarce variations of these guns, some with only one or two 
                known, that I will not attempt to cover here. 
                If you are interested in learning more about these guns,
                I suggest you become a member of the Red Eagle News Exchange.  
                The publisher of that newsletter has done extensive
                research and study and goes into considerable detail describing
                those and many other rare Ruger models and variations.   RUGER 
                OLD  MODEL 
                SINGLE-SIX “MAGNUM ONLY” 
                REVOLVER SOME 
                OF  THE 
                MAJOR  TYPES 
                AND  VARIATIONS Single-Six , Magnum marked: 
                  
                    Roundgate, magnum
                    cylinder, early XR3 marked black anodized grip frame, 
                    black checkered hard Rubber or varnished Walnut
                    grips, 6-1/2” barrel.   
                  
                    Roundgate,
                    shipped with two cylinders from factory (.22 Magnum &
                    .22 caliber), early XR3 marked black anodized grip frame,
                    varnished Walnut grips, 6-1/2” barrel.   
                  
                    Roundgate,
                    two cylinders (.22 Magnum & .22 caliber), the later
                    redesigned 
                    XR3-RED marked black anodized grip frame, varnished
                    Walnut or oil filled Walnut grips, 6-1/2” barrel. Bill
                Hamm Read more about Bill on the
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                the web or write to ROCS, P. O. Box 1026, Killen, AL 
                35645-1026.  We welcome you!!   |  | Click pictures for a larger version.
                    
                    
 Two-digit Magnum marked
                  Single-Six, serial number 300019, with checkered black rubber
                  grips.
                    
                    
                    
 Close up view of #19's
                  serial number roll mark on the right side of the cylinder
                  frame.
                    
                    
                    
  
 View of the maker and
                  model roll mark on the left side of the cylinder frame.
                    
                    
                    
 Magnum marked
                  Single-Six with varnished walnut grips, serial number 321217.
                    
                    
                    
 Close up view of #
                  321217's serial number roll mark.
                    
                    
                    
 Top, Magnum marked
                  Single-Six, model "RSSM", serial number 301416
                  shipped with a Magnum only cylinder and varnished walnut
                  grips.  Bottom,  Magnum marked Single-Six
                  serial number 321217, model "RSSMX", shipped with a
                  Magnum cylinder, an extra .22 Long Rifle cylinder and
                  varnished walnut grips.  The last three digits of the
                  serial number are stamped on the face of the .22 Long Rifle
                  "extra" cylinder.
                    
                    
                    
 Front side of  #
                  300019's cardboard outer shipping carton properly numbered in
                  lead pencil.
                    
                    
                    
 The model stamp that is
                  just to the right of the penciled number 300019 on the
                  cardboard shipping carton.
                    
                    
                    
 Magnum box end label,
                  this box is numbered on the left end in pencil
                  for # 300019.
                    
                    
                    
 Box top and
                  instructions & warranty card for the Magnum marked guns.
                    
                    
                    
 Model stamp on the
                  right end of a Magnum marked Single-Six's shipping carton.
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