Well, nothing is ever as simple as it may seem at first. I have been having much more fun with this 1970 issue Smith and Wesson Highway Patroman than I could have ever had had if I had bought it new!! Those of you who dropped by a few days ago are aware that forum member Weatherby, up in beleaguered Massachusetts had kindly donated a spiffy trigger to replace the rusted and pitted one that came with the revolver. I replaced the trigger, and that is where we left off, in post #50, above.
What I didn't mention at the time is that I found a few little challenges in the wake of that replacement. First, the existing cylinder stop had had stock removed to fit it to the original trigger, and it did not work with the new one. Fortunately I had several new, unfitted stops in my shop. This gave me the opportunity not just to fit the new stop to the new trigger, but to fit it to the cylinder stop cuts, and eliminate a bit of play in the cylinder. This in effect tightened up the cylinder, and also timed the stop correctly for the new trigger. Here is the new trigger with the stop fitted:
When I removed the trigger, as I took out the rebound slide, I saw that some one had clipped a coil from the rebound slide spring. Folks often do this to lighten the trigger pull, but it can have several negative effects on performance. I ordered a new spring, but for the time being, I am still using the existing one. This is just one of my pet peeves. I like keeping the correct factory spring, even though I know that many folks change it out or clip coils and still have good results.
One of the effects of a light rebound spring is "push off", particularly if combined with a worn single action edge on the trigger. That was the next little problem that I saw. It has been awhile since I remedied this problem, so I refreshed my mind in the excellent "sticky" right here on the forum, where some of the worlds best Smith Smiths reside!!! Here is a link to the thread:
http://smith-wessonforum.com/s-w-smithing/94072-faqs.html ... post number 6 covers the correct procedure for this simple, but delicate sharpening procedure. You must have the correct stone, a 6"X 1/2"X 1/2" Norton medium India stone. Those of us who have been fortunate enough to have attended S&W Armorer's School were issued one, along with a lot of other specialized tools to make the job easier, and to do it correctly. One should remove the very least ammount of metal possible... the case hardening is relatively shallow, and as you go deeper into the metal it is not as hard. Also, you are tampering with a very delicate balance of geometry which is extremely sensitive.
Here is a diagram of how to correctly sharpen the trigger hook, borrowed from Magnum 500 Nut's excellent thread "FAQs" which is linked above:
Anyway, about 5 minutes or less was more than enough to restore the correct edge to the single action of the new to me trigger. Put it back together again (by the way, it's a good idea to have a few used sideplate screws on hand when taking the plate on and off, to avoid excessive wear and boogering of the screws that came with the gun).
After I replace the rebound spring later, I'll go over the action one more time, just to make sure that everything is to my liking. But for right now, the single action pull is just a little ove 3 pounds, and there is no "push off", and no creep. Double action is great as well.
While I was in there, I found a couple of burrs on the inside of the sideplate that must have come from the factory, as they had been blued over when the gun was blued. You can see where they scratched the case coloring on the exposed (right) side of the hammer. I stoned them down just a little to relieve the hammer. Also ran the rebound slide over an Arkansas stone, to smooth it up just a little.
Well, then with the gun put back together, I function tested it, and found that it was shooting a little tighter, a lot better looking (new trigger and grip adapter) the action, trigger and cylinder were all tighter, and I am now closer to having a really great old warhorse that I will gladly put up against anything that the factory is putting out today!!!
Here is today's target compared with the last one on the 14th:
Thanks again to Weatherby, who sent me that new trigger and grip adapter, which started this project going!!!
And thanks to everyone who is reading this, and letting me share the joy of preserving another fine old firearm from the past. I know that there is a lot of detail here, but it probably took me longer to type than to do it. I was able to resurrect some of my old Armorer skills from the past, even though these little fixes are relatively simple, I always keep in mind the injunction from the Hippocratic Oath that Doctors swear: "First, do no Harm"!!! (Well, I think that's how it goes). So, if you haven't been to Armorer's school, you might want to seek some help when doing some of these things. And as a (retired) armorer, I always remind myself that I am not a "Gunsmith". That is a much more highly trained profession, and requires a lot more investment in equipment and skills.
Best Regards, Les