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Since I have opened up and worked on my 617 & 60 Pro, I decided to open the hood on my 15-3, Combat Masterpiece that was produced in 1969. I bought this used a couple years ago and it quickly became my favorite shooter. Trigger pull was probably average pull weight but fairly smooth and the single action was better than average. Here it is without a sideplate
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Right off I noticed some pretty good rub marks inside the sideplate, and corresponding marks on some internals, including the rebound slide, hand & hammer
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Never had a gritty, or feel like anything rubbing so these points have probably worn to where they were barely touching. After a light stoning, I am now positive there is no contact.
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I also discovered that along the way, someone had cut about 1.5 coils off the rebound slide spring. That’s probably why the single action was better than average. I replaced it with a Wolff 16# spring I had on hand. The factory spring is 18# but I figure if it worked fine with a cut spring, this should be fine. I also polished the rebound slide and the frame where it rides. There were a couple hard rub marks on the frame behind the slide. That area got cleaned up & polished so through a reduction in friction, my 16# spring can probably do the same work as an 18# could before polishing. Re-installed the stock mainspring & snugged down the strain screw.
Picture shows cut spring on left next to a factory spring


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The end result was my double action trigger pull dropped from 10.75 down to 9.64. Didnt check SA, but it feels about the same.. probably over3# but under 4#
 

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Nice gun, thanks for sharing your smithing fixes.
 

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To be honest.....I never even noticed the rub marks on my old revolvers. That's probably because they were LNIB when I bought them used. I used to take 'em apart, but I'm too old for that now.....with poor eyes and shaky hands. I send them to S&W, for repairs, for the past 5 or so years. I don't want to screw 'em up with my incompetence!!!! ;) Bob
 
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