I have a 60-14 that I fire several thousand rounds a year through. Up until recently its been 100%. I know at one time I had a wolf kit, a Wilson kit and an apex kit that have gone into different J frames. I think I have stock springs (trying to identify springs is some sort of tricky) but I think I do. I cant seem to find a good illustration of the springs that should be in it including the firing pin spring. That said I have found that out of 100-150 rounds I will get 3-4 failure to fires. I can load them in another gun and they fire like clock work. I am following as well. This is to a point I don't have faith any longer in my once most reliable side kick.