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Failure to Feed

Discussion in 'Band of Glockers' started by jimbullet, May 17, 2010.


  1. jimbullet

    jimbullet
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    View attachment 197273

    My experience with different glocks have been excellent from a perspective of reliability, durability and it will accept all sorts of ammo that you throw in it...up until now...

    I have encountered a failure to feed situation, which I am trying to assess on how it may have occurred, what factors to look at and how to pre-empt it not to ever occur again. Perhaps some of you have encountered this and have a solution that will prevent this from ever occuring again.

    The scenario is the pistol started with 17 rounds after firing 5 to 8 rounds, the jam occured. I tried to replicate it and see what would have caused it and the only way I could replicate it as shown on the picture, I would have to rack the slide twice, with the first instance not going into battery (closing completely) before racking it again which makes the extractor disengage on the first live round and the slide picking up the 2nd live ammo causing it to jam. This appears highly improbable in a live fire situation but it has happened.

    Any ideas?
     

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    #1 jimbullet, May 17, 2010
    Last edited: May 17, 2010
  2. edtf

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    are those reloads? What caliber? did the rim of the first shell (ejecting shell) catch on the lip where the bullet and shell meets on the 2nd shell? Sorry I can't see it that well
    edit....
    I re-read and guess that that is a glock 17?
     

    #2 edtf, May 17, 2010
    Last edited: May 17, 2010
  3. batangueno

    batangueno
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    Shock Resist

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    Limp wrist
     
  4. jimbullet

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    Its a g17, using factory russian 9mm steel case FMJ ammo. Empty shell ejected fine. Im not too sure whether the ejecting shell catch on anything as the cycling appeared normal.
     
  5. jimbullet

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    Does limp wrist cause the slide to somewhat go back the second time to take up another ammo?
     
  6. Cody Jarrett

    Cody Jarrett
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    Does it only occur with this ammo?

    Normally FTF causes are:

    • Low powered ammo
    • Dirty mag, mag that doesn't seat tightly or damaged or weak mag spring - does it occur with all mags or just one?
    • Dirty chamber - try polishing the feed ramp with flitz and a cloth
    • tight extractor or an extractor with damage/excessive wear- replace the extractor
    • weak recoil spring... replace it every 6,000 rounds anyway
    • limp wrist

    Depending on the age and use of the gun and if the problem occurs with all your mags, I recommend you replace the recoil spring/guide rod and install a new extractor. These are very inexpensive parts.
     
    #6 Cody Jarrett, May 17, 2010
    Last edited: May 17, 2010
  7. edtf

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    I'm not sure if it was the same as mine but I did change my recoil spring and mag springs - problem went away
     
  8. ans3288

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    my own experience also is limp wristing my glock19, mag FTF sya :)
     
  9. atmarcella

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    me thinks ammo is the culprit...
     
  10. jimbullet

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    The pistol however has had only less than 1k rounds through it...

    Did I mention that the empty shell is ejected successfully while two live ammo appears to be trying to go into the chamber at the same time...Just thought to clear that up as the picture might not have shown both being live ammo from the magazine...so not sure if we can eliminate limp wristing here since limp wrist as I know it causes the slide not to fully cycle and so does not take up the live round from the mag?
     
    #10 jimbullet, May 18, 2010
    Last edited: May 18, 2010
  11. darwin25

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    Make your move

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    Limp wrist can cycle the slide far enough to take up a live round from the mag, but not enough so that the mag spring can fully push the round up so the returning slide prematurely picks up the top round resulting in the slide does not fully close and the live round is not fully chambered.
     
    #11 darwin25, May 18, 2010
    Last edited: May 18, 2010
  12. Cody Jarrett

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    With only 1,000 rounds through the gun it's probably not related to recoil or mag spring strength. Limp wristing is a possibility. It doesn't indicate someone is a "bad" shooter. Quite the opposiste. It usually occurs in shooters who are extremely comfortable with recoil. A little "too" comfortable. Please respond to each of the questions individually.

    • Does it occur when other people shoot the gun (eliminate "limp wristing")?
    • Does it occur with all of your magazines?
    • How is the extractor? Is it tight? Have you tried detail stripping the slide and deep cleaning the extractor, Extractor Depressor Plunger, spring and spring loaded bearing?
    • Does the problem also occur when repeatedly handcycling with snap caps?
    • Have you tried using someone else's mags?
    • Does it only occur using one specific type of ammo?
    • Has this been happening snce the gun was new?

    At 1,000 rounds she's well "broken in" and should function flawlessly. Think about the questions above and reply. There's definitely an answer to this... it just requires isolating the nature of the double feed.
     
    #12 Cody Jarrett, May 18, 2010
    Last edited: May 18, 2010
  13. vega

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    Check your extractor, might have a ding on it.
     
  14. atmarcella

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    when the slide was going back to chamber the round, the bullet rim/case head should also be able to insert inside the extractor... me thinks this did not happen.

    so it might be the extractor or the bullets.

    try bullets of another manufacturer and see if it still happens, if it does then you've norrowed the culprit down to the extractor.
     
  15. jimbullet

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    Having assessed all of the above, I couldnt eliminate limp wristing, or ammo or magazine problem.
     
    #15 jimbullet, May 19, 2010
    Last edited: May 19, 2010
  16. jimbullet

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    The 2nd ammo that is being taken up does not have the opportunity to slip under and into the extractor as the 2nd round moved forward on the mag and could not go up due to the 1st round sort of hanging half way in the chamber.
     
  17. Allegra

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    it could also fall under the ****** happens category
    when the gun/ammo/mags has been triple checked yet myseriously jams on match day
     
  18. HEAVY

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    "Verify!"

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    + 1 on the extractor.

    baka bungi, or not tensioned properly.
     
  19. isuzu

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    Try extra power mag springs by Wolff and try a different brand of ammo.
     
  20. atmarcella

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    maybe the reason why it did this is bcos its rim did not/could not insert itself inside the extractor.

    neglect the 2nd round, focus on why the first round jammed. the round that is left hanging halfway inside the chamber.