S&W Centennial Hammer Modification ?

This is a discussion on S&W Centennial Hammer Modification ? within the General Firearm Discussion forums, part of the Related Topics category; The triggers in my 640 and 642 are getting pretty smooth with some stoning and new springs but I still feel a glitch when it ...

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Thread: S&W Centennial Hammer Modification ?

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    Ex Member Array jtmoose's Avatar
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    S&W Centennial Hammer Modification ?

    The triggers in my 640 and 642 are getting pretty smooth with some stoning and new springs but I still feel a glitch when it comes into the SA notch on the hammer. Being centennial frames and DAO, could the hammer be stoned, removing the SA notch (wouldn't take much), making it butter smooth until break?

    PS. Why do the centennial hammers even have that notch in the first place?

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    I was surprised and amused to take my Model 642 down when I first got it to find a single action sear. With the side plate off, one could manipulate the gun to operate with the single action sear. Gave a nice trigger pull too. Typical Smith & Wesson single action feel, like breaking a thin glass rod. One supposes that all J-Frame hammers are actually finished out the same prior to the steps taken to form unique DAO style for hammers installed in the Centennials.

    Try cycling the action some time with the side plate off. The single action sear doesn't come into play with the double action operation of the lock work so its removal won't have any affect on smoothness.
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    Ex Member Array jtmoose's Avatar
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    It must be something else that gives it a pause. I can't identify what it is though.

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    VIP Member Array BugDude's Avatar
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    Quote Originally Posted by jtmoose View Post
    It must be something else that gives it a pause. I can't identify what it is though.
    There's a notch in the trigger transfer (just inside the trigger guard with the side plate off). I believe it has to do with trigger reset. I wanted to smooth mine out too, but was afraid it would negatively impact reset and left it alone. I notice it staging the trigger, but not really when firing rapidly.
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