There may certainly be a difference in the type of steel or its heat treatment, even if the Model 15 and Model 19 cylinders are otherwise dimensionally identical except for chamber depth. Not being privy to S&W's production process, I do not know. I just render unto Special what is Special's and to Magnum what is Magnum's



Your gun, you can make your choices and take your own chances. Just let me know when you are on the firing line.