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I need heavy duty mainspring

Discussion in 'Gunsmithing and Repairs' started by PinnedAndRecessed, Jul 7, 2006.

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  1. PinnedAndRecessed

    PinnedAndRecessed member

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    I have a Model 66-1 with 2 1/2 inch barrel. The previous owner apparantly installed an aftermarket mainspring to lighten the trigger pull. This is a SD gun so his motivation escapes me.

    Anyway, can anyone recommend a heavier-than-stock mainspring for this gun? Options? Considerations?
     
  2. dfariswheel

    dfariswheel Member

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    Dec 26, 2002
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    There's no need for a HEAVIER than stock spring.
    S&W used factory springs with more than enough strength.

    I'd replace the mainspring, and the trigger return spring. These are the two usually altered or replaced when doing action jobs.

    You can order new, factory original springs from:
    Brownell's.
    Direct from S&W.
    Gun Parts Corporation.

    After installing new factory strength springs, you'll never have ignition problems again.
     
  3. Old Fuff

    Old Fuff Member

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    If the revolver is otherwise unaltered and in good condition a stock S&W mainspring should be enough. Both extra-heavy aftermarket springs as well as stock S&W ones are available at: www.brownells.com

    While you are at it, be sure the former owner didn't tamper with the rebound (trigger return) spring too.
     
  4. Old Fuff

    Old Fuff Member

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    Not necessarily. I have seen revolvers that had ignition problems because of excessive headspace caused by cylinder end-shake.
     
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