I'm fitting a new Power Custom hammer nose onto my 66 no dash. Install was straight forward. I'm fairly confident I got the rivet expanded properly. My question is, does anybody know the proper firing pin protrusion measurement for a K-frame Combat Magnum?
The instructions included with the Power Custom hammer nose kit called for .045"-.062" measured from recoil shield to tip of hammer nose. Mine was measuring quite long at .067" so I managed to file it down to .060" protrusion.
I fired a dozen 38 specials and primer indentations are VERY prominent.
Likely too prominent as I can see a dimple (actually a small protrusion) in the center of each primer strike which I assume was made by the primer cup contacting the primer anvil during firing.
Should I shorten the firing pin another .005"?
Suggestions?