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Thread: S&W Revolver Problems

  1. #21
    Boolit Grand Master Outpost75's Avatar
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    Quote Originally Posted by Tatume View Post
    Beg to differ. Please refer to "The S&W Revolvers, A Shop Manual" by Jerry Kuhnhausen, 5e, pg 81, Bench Note 3: "The mainspring strain screw must be fully threaded in and seated in the frame. Mainspring arching, tension and weight are reduced by trail adjusting strain screw extension length and not by loosening the strain screw."
    NEVER! DO THIS ON A GUN YOU WILL CARRY!

    Was sometimes done for a paper puncher, but testing by the ammunition companies and also at BRL has proven that striker energy of less than 0.010" copper indent as measured using the "C " size copper in the government gage holder in .38 Special increases velocity variation and induces significant and readily noticable increases in vertical dispersion at 50 yards.
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  2. #22
    Boolit Master
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    There is no better source of reliable information on S&W revolvers than Jerry Kuhnhausen. He gives factory specifications, and demonstrates how to achieve factory specs. Kuhnhausen is a much better source of information than Internet "experts."

  3. #23
    Boolit Grand Master Outpost75's Avatar
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    Quote Originally Posted by Tatume View Post
    There is no better source of reliable information on S&W revolvers than Jerry Kuhnhausen. He gives factory specifications, and demonstrates how to achieve factory specs. Kuhnhausen is a much better source of information than Internet "experts."
    Factory-trained law enforcement armorers and the government's weapon engineers at FLETC, NASC Crane, IN, FBI Quantico, Picatinny Arsenal and BRL would disagree.
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  4. #24
    Boolit Master
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    When I attended the S&W Armorers School, we were taught to screw the strain screw in tight and leave it alone.

    Pretty sure the instructor knew his way around the S&W revolver. That screw is not for adjusting the tension on the mainspring.

    Kevin
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  5. #25
    Boolit Grand Master Outpost75's Avatar
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    I attended S&W police armorer's school in 1982 and was taught by Chet Grondalski and Archie Duibea (sp?) I could tell stories out of school of contract goings on which were investigated by Feds. Suffice to say in that era corporate morality was on a par with VW emission testing today....
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  6. #26
    Boolit Master curioushooter's Avatar
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    I've found ebay to be a great resource. Try looking for N frame parts...you may even find one out of a 25 of the same vintage. Though I hate it when people mess with the hammer or anything connected to it!!!

    Strain screws are available. Besides...every S&W seems to benefit from a Wolffe type I or type II. Wolffe will throw in an extra long one if you ask.

    Get Kuhnhausen's book.

    If push comes to shove you can sell it.

    All S&Ws with external hammers should have the hammer block. Sheesh. My 442 doesn't have one since the hammer is internal. I cannot tell vs. my wife's 638. Why people remove them is beyond me.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check