Results 1 to 7 of 7

Thread: Revolver Mis-fire on slow trigger pull

  1. #1
    Member
    Join Date
    Jun 2008
    Location
    Anchorage, AK
    Posts
    505

    Default Revolver Mis-fire on slow trigger pull

    I have a Hi Standard Sentinel MkII .357 revolver purchased at auction a couple years ago. I have never gotten around to firing it till this weekend and found a possible problem.

    It will fire fine in single action, but in double action it tends to misfire with a slow trigger pull, but will fire fine with a quick trigger pull. Had 4 misfires out of 20 rounds. I was using FMC ammo.

    Is anyone familiar with such an issue? Would it be related to the firearm or the ammunition?

    Planning on taking it to a gunsmith when I have the time and cash to get it checked out.
    Just a bitter Alaskan clinging to his guns and religion.....

  2. #2

    Default

    First thought, are you certain you are letting the trigger completely reset during 'slow' trigger pull?
    "When the time comes for a man to look his Maker in the eye, where better could the meeting be held than in the wilderness?"

  3. #3
    Member
    Join Date
    Aug 2007
    Location
    Eureka MT
    Posts
    3,048

    Default

    See if you can measure the distance the trigger pulls the hammer back before releasing vs how far back it is when set by hand. I suspect it is not going back near as far by trigger pull. I don't know if you will be able to tell if a quick pull is bringing the hammer back farther or not but maybe by holding the gun in a vise and holding a piece of wood or such behind the hammer and doing the slow and fast pulls. I doubt it is an ammo problem.

  4. #4
    Sponsor ADfields's Avatar
    Join Date
    Nov 2008
    Location
    Missing Palmer AK in Phonix AZ.
    Posts
    6,416

    Default

    Quote Originally Posted by rbuck351 View Post
    See if you can measure the distance the trigger pulls the hammer back before releasing vs how far back it is when set by hand. I suspect it is not going back near as far by trigger pull. I don't know if you will be able to tell if a quick pull is bringing the hammer back farther or not but maybe by holding the gun in a vise and holding a piece of wood or such behind the hammer and doing the slow and fast pulls. I doubt it is an ammo problem.
    That was my first thought too but it doesn't make sense to me that a fast pull would draw it back more. I'm thinking it more likely that something is dragging, slowing down the hammer, sear or something rubbing with a slow pull. But when trigger is pulled fast everything clears and the hammer travels at full speed. I very much doubt itís ammo but itís always possible.
    Andy
    On the web= C-lazy-F.co
    Email= Andy@C-lazy-F.co
    Call/Text 602-315-2406
    Phoenix Arizona

  5. #5

    Default

    It's been a looooong time since I pulled apart a Sentinel, but odds are good that someone "tuned" the action by lightening the main spring one way or another. Your symptoms sound just right. Fast fire throws the hammer back a little further, so it comes forward with just enough extra oomph to pop most caps. Slow fire lets it drop a shorter distance and you get a click. Some caps like Remington small pistol are softer and might solve the problem if you're a reloader, but in the meantime I'd be checking around for a replacement main spring.

    One other possibility, but less likely, is build up of crud in the action, especially on either side of the hammer body and on the pivot. Had it happen to me on a 629 I left rattling around under the seat of my truck for a year. Lint, hair, dirt and who knows what gummed up the action. In my case it resulted in a much heavier DA trigger pull along with failure to fire with mag primers. Easy fix with a good cleaning and lubing.

  6. #6
    Member
    Join Date
    Jul 2008
    Location
    Bakerton, WV
    Posts
    467

    Default

    Quote Originally Posted by BrownBear View Post
    It's been a looooong time since I pulled apart a Sentinel, but odds are good that someone "tuned" the action by lightening the main spring one way or another. Your symptoms sound just right. Fast fire throws the hammer back a little further, so it comes forward with just enough extra oomph to pop most caps. Slow fire lets it drop a shorter distance and you get a click. Some caps like Remington small pistol are softer and might solve the problem if you're a reloader, but in the meantime I'd be checking around for a replacement main spring.

    One other possibility, but less likely, is build up of crud in the action, especially on either side of the hammer body and on the pivot. Had it happen to me on a 629 I left rattling around under the seat of my truck for a year. Lint, hair, dirt and who knows what gummed up the action. In my case it resulted in a much heavier DA trigger pull along with failure to fire with mag primers. Easy fix with a good cleaning and lubing.
    This is correct. The mainspring is too weak. Double action has a shorter hammer fall.

  7. #7
    Member
    Join Date
    Sep 2007
    Location
    Eagle River AK
    Posts
    400

    Default

    BrownBear, I think you nailed it. No need for further explanation/speculation by me as you described what is likely happening very well.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •