I have two Smith & Wesson model 19 revolvers. One is a 19-3 and the other is a 19-5. The 19-3 performs perfectly with my handloads using CCI primers, but the newer 19-5 will fail to fire about 2 or three rounds out of 50. The primer strike appears to be light on the rounds that fail to fire.
I bought the older gun new way back when, but the 19-5 was purchased used, and I am not sure if any mods were made to it. I have looked into installing a Wolff mainspring, but have questions. I have no experience working on revolvers, so I am not sure what is involved in replacing the mainspring. Is this something an amateur like me can do, and if so what do I need to watch out for? Do instructions come with the Wolff kit? And finally, do you think a new mainspring will solve the problem?
I realize that CCI primers are thought to be quite hard, but I have a lot of them, and I want the revolver to reliable with any ammo.