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glock 27 feeding problem

midnightrunpaintballermidnightrunpaintballer Member Posts: 2,233 ✭✭✭✭✭
edited March 2013 in Ask the Experts
Have a gen 3 glock 27 that is having random failures to feed on the last round in the mag. Problem occurs with mags from 27, 23, and 22 that all function 100% in my 23. Changing ammo types and brands doesn't seem to help. Problem occurs with hollow points and fmj's. Any ideas?

Edit to add: I bought it used (police trade in) and other than night sights, all parts are factory Glock. The malfunctions that are occuring are the nose of the bullet jamming into the feed ramp and sticking there instead of ramping up into the chamber. From a normal look, I thought the problem was bad spring/follower in the mag, but it did it with mags that I know work too. Is the angle of the feed ramp geometrically different because of the smaller barrel? It doesn't look like polishing the feed ramp will help. But I'm not a gunsmith either.

Comments

  • charliemeyer007charliemeyer007 Member Posts: 6,572 ✭✭✭
    edited November -1
    Look closely at the contact between the lip(s) and the cartridge with one round and three in the magazine. Probe the contact area with a thin feelers gauge. Perhaps the follower isn't providing the same contact to the lips on that last round as when the shells can adjust in the stack with more spring pressure and the ability to shift their angle. Just my thoughts.
  • midnightrunpaintballermidnightrunpaintballer Member Posts: 2,233 ✭✭✭✭✭
    edited November -1
    quote:Originally posted by charliemeyer007
    Look closely at the contact between the lip(s) and the cartridge with one round and three in the magazine. Probe the contact area with a thin feelers gauge. Perhaps the follower isn't providing the same contact to the lips on that last round as when the shells can adjust in the stack with more spring pressure and the ability to shift their angle. Just my thoughts.


    Well that's kinda what I was thinking at first but then these mags feed just fine in another glock... That leads me to believe the problem is the gun and not the mags. Again, I can't be sure. That's why I'm here.
  • rufe-snowrufe-snow Member Posts: 18,650 ✭✭✭
    edited November -1
    Glocks are what is known as controlled feed, i.e as the slide goes forward into battery the front of the slide pushes the round out of the magazine. As it does this the rim rises and is captured between the rear face of the extractor and breech area of slide.

    If everything works OK in the 23, you might consider the extractor of the 27. Take it out and compare it to the one in the 23. Try swapping them out, if they are interchangeable. If not spring for a new extractor. Glock is known for making incremental changes. Might have tweaked their latest extractors, with none being the wiser?
  • midnightrunpaintballermidnightrunpaintballer Member Posts: 2,233 ✭✭✭✭✭
    edited November -1
    quote:Originally posted by rufe-snow
    Glocks are what is known as controlled feed, i.e as the slide goes forward into battery the front of the slide pushes the round out of the magazine. As it does this the rim rises and is captured between the rear face of the extractor and breech area of slide.

    If everything works OK in the 23, you might consider the extractor of the 27. Take it out and compare it to the one in the 23. Try swapping them out, if they are interchangeable. If not spring for a new extractor. Glock is known for making incremental changes. Might have tweaked their latest extractors, with none being the wiser?


    My 27 and 23 are both gen 3's. I didn't think about the extractor. Surely they're the same shape and size being from the same generation. What specifically should i look for?
  • rufe-snowrufe-snow Member Posts: 18,650 ✭✭✭
    edited November -1
    quote:Originally posted by midnightrunpaintballer


    My 27 and 23 are both gen 3's. I didn't think about the extractor. Surely they're the same shape and size being from the same generation. What specifically should i look for?



    See if there is any difference between them. Check the radius of the "claw" for roughness or burrs. If their is no discernible difference, swap them out to see if you can induce the same sort of last round feed failure in the 23.
  • midnightrunpaintballermidnightrunpaintballer Member Posts: 2,233 ✭✭✭✭✭
    edited November -1
    quote:Originally posted by rufe-snow
    quote:Originally posted by midnightrunpaintballer


    My 27 and 23 are both gen 3's. I didn't think about the extractor. Surely they're the same shape and size being from the same generation. What specifically should i look for?



    See if there is any difference between them. Check the radius of the "claw" for roughness or burrs. If their is no discernible difference, swap them out to see if you can induce the same sort of last round feed failure in the 23.


    Gotcha. Will play with that tomorrow. Thanks for the help!
  • NordicwargodNordicwargod Member Posts: 102 ✭✭
    edited November -1
    Its the magazine! Same thing happened to me and it was only on the last round. How old were the magazines you were testing it with?
    Police turn ins don't get shot much but they do sit around loaded alot. I have two police turn in 40 and a police turn in 17. All the mag springs were wasted/worn out.
    Put a new magazine spring in any of the mags and "test" it. Its also the least expensive fix and the first one you should try. Wolff springs sell "extra power" springs which work well.
    The magazines you tried may work on the other guns but the 27 "may" have a little different feed ramp because of its compactness.
    If you have a brand new mag try it too!
    Also replace the striker spring! It also will sit compacted for weeks if not months.

    quote:Nordic: if the striker spring is shot, wouldn't that result in light primer strikes? I'm asking because I'm not sure what the symptoms would be but I'm definitely not having any light strikes... Something to worry about now? In the future? What should I look for?

    Yes! A worn out striker spring would result in light strikes. I'm afraid the only symptom is a light strike now and then. I reload and some of the primers you buy can be rather hard and take a good strike to ignite so you learn quickly which brand is the softest. [Federal], and which ones are the hardest [Wolf/Tula] and which ones fall inbetween.
    A simply way to tell is to buy a new standard power striker spring, remove the one installed on your striker assembly and compress them. If the one on your striker compresses much easier then its time for replacement. Yes you will be able to tell the difference if one of them is shot.
    My logic about the police armorer maintaining the guns is that if the mag springs were worn then the rest of the springs are worn [the striker spring being the most important].
    Wolff also sells complete spring sets for glocks. Replace your recoil spring too!
    Some "experts" will give you a round count to replace everything! If the gun sits with a round in the chamber with a full magazine for months at a time, both the striker and mag spring will be the first to go even though the gun has not been shot!
    And,,,,,all the springs on a glock are cheap!
  • midnightrunpaintballermidnightrunpaintballer Member Posts: 2,233 ✭✭✭✭✭
    edited November -1
    Ok guys I solved the problem today. Rufe: the extractors were apparently both the same as swapping them didn't change anything. The feed ramp on my 27 appears to have not been milled out completely at the factory. There is a 1/16" ledge at the bottom where the rounds are hanging up. I called Glock and they said it wouldn't have left the factory if it wasn't in spec. The magazine spring was weak and not pushing the follower hard enough allowing the nose of the round to clear that tiny little lip. Only a problem on the last round because additional rounds were causing enough pressure in there. Nordicwargod you hit the nail on the head. I put the 23 spring in the 27 mag and the problem went away. Stretched the 27 spring out a little bit and problem is still solved. So I've fixed it (temporarily) until my new wolff springs get here. Just ordered them.

    Thanks to everyone for your help!

    Nordic: if the striker spring is shot, wouldn't that result in light primer strikes? I'm asking because I'm not sure what the symptoms would be but I'm definitely not having any light strikes... Something to worry about now? In the future? What should I look for?

    Ok nordic, thanks for the help. I reload also and haven't had any light strikes. But hey, you're right, springs are cheap. Already replacing mag springs, was planning to replace recoil springs too since I have no way of knowing round count on 27 and have lost count on 23. Might as well change striker springs too. If for nothing other than peace of mind. Which is a HUGE deal when referring to my carry guns.
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