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What causes hammer follow?

Discussion in '1911 Forums' started by SIGShooter, Jan 21, 2011.

  1. SIGShooter

    SIGShooter Hucklebucks

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    Jan 25, 2005
    I'm having a weird occurrence that has never happened before with my TRS.

    Hammer follow

    It has never done this before. It started on Sunday after a range trip. 250 rounds down range, no issues. I didn't plan on cleaning it until after the next range trip so I just added some CLP for a little extra lube.

    After the CLP, I released the slide and the hammer dropped to the half cocked position. Here's the weird thing, I released the slide while holding the pistol in my left hand and this happened. 3 out of 5 times. I switched hands and it didn't happen. This never happened while shooting.

    Now, Monday I went back to the range, gun in the same fashion I left it. I put 490 rounds down range. CLP after every 200 rounds. No issues with the hammer dropping to half cock. Put the gun away and left it for cleaning this week. I cleaned it yesterday and did a complete functions check on it.

    I locked the slide back, gun in my right hand, released the slide and the hammer dropped to half cock.

    I'm kind of at a loss right now. I will be contacting Baer on Monday. But until then, what can I check or do to maybe rectify this myself? I won't be carrying it until it's fixed.

    I appreciate any advice in advance.
     
  2. Quack

    Quack Rent this space

    9,991
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    Jan 7, 2002
    NE Ohio
    weak sear spring, trigger bounce, damaged sear or hammer.
     


  3. SIGShooter

    SIGShooter Hucklebucks

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  4. Quack

    Quack Rent this space

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    NE Ohio
    Trigger bounce is when the slide slams forward, the trigger "bounces" enough to trip the sear.
    when releasing the slide on an empty chamber, there is no resistance from feeding a round from the magazine or the cushioning the round provides as it goes into battery.

    are you dropping on an empty chamber?

    here's a set of tests i do:

    first lock the slide back, pull/hold the trigger forward, release the slide.
    does the hammer drop?
    if so, then it's the sear spring tension or hammer/sear engagment issue.

    now if it didn't drop, do the same thing but don't hold the trigger forward and drop the slide.
    does the hammer follow? if so, then you are getting trigger bounce. to correct this, increase tension on the center leg of the sear spring.
     
    Last edited: Jan 21, 2011
  5. SIGShooter

    SIGShooter Hucklebucks

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    When it first happened I did drop the slide on an empty chamber. I repeated the process 4 more times.

    I will give your test a run. I have new sear springs at home but didn't ring any with me.
     
  6. Quack

    Quack Rent this space

    9,991
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    Jan 7, 2002
    NE Ohio
    forgot to add that the tests are also done while holding the grip safety depressed.

    and holding the trigger forward as in the opposite direction than you would when you pull the trigger to fire it.
     
    Last edited: Jan 21, 2011
  7. FLIPPER 348

    FLIPPER 348 Happy Member

    22,934
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    Oct 7, 2000
    Bend Oregon
    this


    Has anyone done a 'trigger' job on this 1911??
     
  8. SIGShooter

    SIGShooter Hucklebucks

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    No, box stock from Baer.
     
  9. SIGShooter

    SIGShooter Hucklebucks

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    Jan 25, 2005

    You're making fun of me with this post aren't you…















    No, I'm just kidding. I understood your directions.
     
  10. Quack

    Quack Rent this space

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    now i haven't cracked on you about Sig's yet, so i'm being nice so far :rofl:
     
  11. Jason D

    Jason D INFRINGED Silver Member Millennium Member

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    Jun 16, 1999
    Mivonks, MI
    Patrick Sweeny has something he calls the flick test.
    It's pretty much having the grip safety compressed, slide closed, and pulling the hammer back beyond the cocking point and letting it go. He claims you can do that all day without damaging the gun.

    If the hammer falls at any point during this test, it's probably the sear spring.
    I had a .45 that started doing this after a couple hundred rounds.

    When I finally took the gun apart I found that the manufacturer has ground the side of the sear spiring to give the gun a lighter pull. What it really did was ruin the spring.

    I had to adjust the tension on a new Clark spring and install that.
     
  12. Quack

    Quack Rent this space

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    I use Colt sear springs. It's what others, such as C&S, use in their trigger kits.
     
  13. Jason D

    Jason D INFRINGED Silver Member Millennium Member

    42,011
    1,035
    Jun 16, 1999
    Mivonks, MI
    I called Brownells tech services to find out what Spring to get.
    The guy I talked to seemed to think the Colt Springs were over priced and over rated.

    The only reason I picked Clark, was because it was cheaper at the time.
    Either way my problem was solved and the gun will pass any test thrown at it.
    Since the weather was getting bad at the time, I have yet to do more than just test fire it.
     
  14. Quack

    Quack Rent this space

    9,991
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    NE Ohio
    colt springs are about $4 vs. the same C&S springs for $7
     
  15. SIGShooter

    SIGShooter Hucklebucks

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    I have his book for the 1911. I tried that same test. Nothing has happened. Well, except for a blister on my thumb.

    I have spare sear springs but they are at home and I'm in Maryland.
     
  16. SIGShooter

    SIGShooter Hucklebucks

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    Quack,

    I'm going to go with trigger bounce.

    Locking the slide to the rear, empty chamber, holding the trigger in the forward position, the hammer will not fall to the half cocked position. Now, not holding the trigger, it will fall.

    One thing I have noticed…

    My trigger has a lot of take up. It has never had this much before. I don't have a ruler but my guess would be it has some free travel of about 1-1.5mm. Maybe more but I have no way to measure it. That is, until it actually engages the sear.

    I've got roughly 3,000 rounds through this gun so far.
     
  17. Quack

    Quack Rent this space

    9,991
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    NE Ohio
    Add some tension to the center leg of the spring.
     
  18. SIGShooter

    SIGShooter Hucklebucks

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    Jan 25, 2005
    Okay, just got done adjusting the sear spring…

    A huge difference! The trigger doesn't have as much free movement, the reset is positive (Before I adjusted the sear spring the reset was sloppy and very weak).

    I will go through the tests again and see what comes of it.

    As soon as I get home I will change out the sear spring.

    Which brings me to another question…How many rounds until I replace the sear spring? This is the original one in the gun.
     
  19. Quack

    Quack Rent this space

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    NE Ohio
    Good to hear. Not sure on recommended spring replacement intervals.