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. 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. 22 “Magnum Only” around June of that same year. 22 Magnum cartridge was introduced by Winchester in 1959.Ruger introduced its Single-Six single action revolver in.
GENERALOVERVIEW Old Model Single Six-Serial Number | Ruger Forum RUGEROLDMODELSINGLE-SIX “MAGNUM ONLY” REVOLVERS Not too many of that serial number range, and perhaps 5000 or so were convertibles, having the 'extra'.
