I went through an FBI taught firearms instructor class in 1979. Two of the Anchorage agents teaching the class had just returned from inservice training at Quantico and were packing newly issued three inch Model 13s. Those of us packing Model 19s and Model 66s looked down on the lowly fixed sight guns. Now I regularly carry a three inch Model 65. It is one of my favorite carry guns. I figure I still have a lot to learn.