sentences:  At that time the Model 60 featured a 1.875" barrel and was chambered solely for the .38 Special.Like the Model 36 (Model 50), S&W produced a limited-production version with adjustable sights, the Model 60-1 Chief's Special Target.In 1996, the stronger J-Magnum frame was introduced and the cylinder was lengthened to support the .357 Magnum round, (as well as the .38 Special).