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22 diamondback

Discussion in 'Handguns: Revolvers' started by russ45, Jul 13, 2008.

  1. russ45

    russ45 Well-Known Member

    I just started shooting this 22 diamondback, and am experiencing light primer strikes on 1 or 2 out of 6 cartridges in double action, using 5 different brands of high velocity ammunition. Cartridges usually fire on the second strike. Single action is just fine. My semiauto shoots the same cartridges without any failures. The revolver is new, and I can't see anything wrong. Action is smooth, and I don't think heavier springs are available for this model. I am thinking there may be cartridges available with softer primers. Any ideas?
  2. SaxonPig

    SaxonPig Well-Known Member

    1. Thoroughly clean the gun. Gummy old grease, grit, dirt, etc can hamper the action.

    2. If that doesn't do it, someone may have monkeyed with the hammer spring in a Home-brewed action job and it may need replacing.
    Last edited: Jul 13, 2008
  3. 22-rimfire

    22-rimfire Well-Known Member

    I would give it a very good cleaning. If you are not comfortable with doing it, take it to a gunsmith. The gunsmith may also have some thoughts on the light hits on the primers. Be careful choosing who works on the gun beyond cleaning it. The gun is worth fixing.
  4. russ45

    russ45 Well-Known Member

    I know the history of this gun, and it is the original action. I already tried the thorough cleaning. I suppose the spring could be removed and bent out some more in an attempt to make the hammer strike heavier. I have a 38 Agent carry gun that probably has had an action job, and it won't fire anything reliably in double action except with a Federal primer, so I thought maybe softer primered 22 cartridges may be available, maybe is target loads or something. I have fired less than 100 rounds in this. Maybe a few hundred more will help. Thanks for the reply.
  5. dispatch

    dispatch Well-Known Member

    Trade it for a S&W Model 18.
  6. SaxonPig

    SaxonPig Well-Known Member

    Well, if cleaning didn't help then it's ruined.

    Give ya $50 for it... You said it fires 5 out of 6 times and that's good enough for me.
  7. 9mmepiphany

    9mmepiphany Moderator

    5 out of 6 is good enough for me too...i'll give you $100
  8. dfariswheel

    dfariswheel Well-Known Member

    On revolvers, especially the older Colt type action, when the revolver fires 100% in single action, but mis-fires in double action, the "usual" is an altered or weak mainspring.

    The "best" fix is to have a new factory spring installed.
    Note: All the later Colt "D" frame revolvers used the same mainspring. A spring from a Detective Special, Cobra, Agent, or Diamondback will work.
    Factory part number is 56090,
    You can buy new "D" frame springs here:

    Jack First.
    Probably the best place to check first, but you have to actually CALL:

    Click on COLT, and WAIT, it's slow.

  9. Standing Wolf

    Standing Wolf Member in memoriam

    Must be a Colt revolver: we're in a bidding war already.
  10. harmonic

    harmonic member

    Give ya $50 for it... You said it fires 5 out of 6 times and that's good enough for me.

    5 out of 6 is good enough for me too...i'll give you $100

    Ok. Ok. I'll go $200.
  11. SaxonPig

    SaxonPig Well-Known Member

    I'm out...
  12. Pilot

    Pilot Well-Known Member

    X2. I had a Python that did this. Found out the previous owner had the mainspring lightened. I put a new mainspring in and the problem was solved.
  13. russ45

    russ45 Well-Known Member

    Thanks dfariswheel and pilot. I will try the new spring. That must be the problem because there the firing pin goes all the way in, it just doesn't seem to have enough force. Some Colt parts are getting hard to find, and I thank you for the links.
  14. Shade00

    Shade00 Well-Known Member

    I'll trade ya a real, working Diamondback .38 for that Diamondback .22. Beat that. :p

    If you are planning on changing the mainspring yourself, I would highly suggest you order a copy of Jerry Kuhnhausen's The Colt Double Action Revolvers: A Shop Manual, Vol. I. In fact, I doubt you would even be able to do it without the manual.
  15. 9mmepiphany

    9mmepiphany Moderator

    why?...does it require more than a pair of needlenosed pliers
  16. Shade00

    Shade00 Well-Known Member

    I would be hesitant to do ANYTHING inside a classic Colt without the shop manual at my side. Not to say some can't or won't, but to suggest otherwise for an inexperienced individual, even for a relatively minor operation, is folly in my opinion.
  17. 9mmepiphany

    9mmepiphany Moderator

    i'm being slightly tongue in cheek. i actually recommend taking any old colt to have it checked by an experienced Colt Pistolsmith
  18. JNewell

    JNewell Well-Known Member

    You can do anything with a Dremel! =8-0

    The thing about Colts like this is, if you foul it up or even scratch the sideplate, you've got a $250-350 scratch. Break something inside and there are very few smiths left who can competently fix it. So, yes, it's worth buying Kuhnhausen, imho.
  19. Shade00

    Shade00 Well-Known Member

    Sorry 9mmepiphany, just misread. You're right, the best option is to take it to a gunsmith, but it may be quite costly to find one that can do proper work. That said, if you are going to do smaller repairs (not a lot of what qualifies a smaller on these old guns) then JNewell is correct, things can turn bad AND costly quickly.
  20. Standing Wolf

    Standing Wolf Member in memoriam

    The bigger the hammer, the faster you'll get the gun apart.

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