Just for my further knowledge of older revolvers:
Like modern frame mounted extended firing pins, in older
k-frames etc, are (or were) there longer hammer mounted firing pins for use with light springs and action- lightened triggers? To obviously eliminate any chance of light primer strikes. If so, was it sold as the pin only; or an entire new hammer with longer pin pre-mounted?

I am not aware of any longer hammer noses for modified revolvers. Before parts swapping became gunsmithing, when you took your revolver to someone for an action job they simply reworked the existing parts. The whole concept of an action job is basically accelerated wear on the parts to make them smooth. Dryfiring accomplishes the same thing. And when you got your revolver back, their was no admonishment to use a certain brand of primer or ammunition. If it did not work with everything, it wasn’t finished.

Parts changing became popular when gunsmiths realized they could make additional money by selling parts to the owners who thought they could save money by doing their own work. So, lightened springs were created and sold. Hammers, triggers, barrels, etc can all be purchased and swapped out. Sometimes it works. Sometimes, not.

Kevin

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Power Custom's hammer nose kit features an extended length firing pin/nose. Installed one on my 19-3 because the original factory hammer nose was too short. BTW, this revolver had zero evidence of being fired when I purchased it, probably due to the60-70% misfire rate in DA. After installing the new firing pin test shooting showed that the firing pin needed to be fitted by about 0.02-0.03 inch.