Inside a S&W 15-3
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Thread: Inside a S&W 15-3

  1. #1
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    Inside a S&W 15-3

    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#
    Injunbro, Curt360, Digger and 6 others like this.

  2. #2
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    Was able to get it all back together with no spare parts... and everything still works!
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    Injunbro, Cliff, 1av8r and 7 others like this.

  3. #3
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    Nice gun, thanks for sharing your smithing fixes.
    jonesy814, Cliff, Curt360 and 1 others like this.
    Have A Good One,
    Rob

    He that hath a purse, let him take it, and likewise his scrip and he that hath no sword, let him sell his garment, and buy one. Jesus

    ‘Twern’t be no good if it wasn’t loaded! John Wayne

    I invest in Lead, Brass and Copper. Me

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    Thanks for sharing. I have never seen that picture of “trouble indicators”. I like it. When I was shooting competition we cut the rebound spring regularly.
    Paul

    STUPID WILL GET YOU KILLED

  6. #5
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    It appears your 15 is missing its hammer block?
    jonesy814 and Forester like this.
    We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defense, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.

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    Quote Originally Posted by Breakaway500 View Post
    It appears your 15 is missing its hammer block?
    No, it came out with the sideplate. Its back in the gun now.

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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
    jonesy814, Curt360 and Cliff like this.
    When you want the BEST! Bob


 

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