What kind of malfunction is this?


July 5, 2004, 07:56 PM
I was shooting my Glock 30 with some friends, and the same thing happened two different ways:

1) I was teaching a friend to shoot and she was trying out the 30. She slapped the mag in, pulled back the slide as I taught her, and the round would not chamber all the way. It only went in about 3/4 of the way, just as in incident #2.

This happened to her several times right in front of my face, but I could not get it to do it myself when I took the gun, which leads me to believe that it was just her being too gentle with the gun or otherwise her fault. However, this also happened:

2) I personally was shooting my 30 and the last round did not feed completely; it was about 3/4 of the way in the chamber. I would drop the mag, and the round would fall out.

What could cause this problem? Weak mag springs? Any ideas on either 1 or 2?

Thank you!

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July 5, 2004, 08:02 PM
It's called a Failure to Feed.

From your description of the girl's jams, it's probably the result of not pulling the slide back far enough or not letting go of it abruptly enough. It's common for someone with low hand strength, or with an auto that has a particularly stiff spring.

Yours was probably due to not holding the gun firmly enough.

July 5, 2004, 08:03 PM
Thanks John.

What would cause it to happen while firing the gun as I described in #2?


July 5, 2004, 09:47 PM
Sorry, I did an edit when I noticed I only answered half your question--but you were quicker on the draw! ;)

I'm guessing that you relaxed your hold a bit on the pistol or you need to take a firmer hold on the pistol and keep your wrists locked. Small large caliber polymer pistols require a pretty firm hold, particularly as the magazine gets close to empty.

Black Majik
July 5, 2004, 09:48 PM
The 2nd one is FTRTB (Failure to Return to Battery).

That's usually caused by limpwristing the gun while firing.

July 6, 2004, 05:43 AM
Lemme see...Top round failure to go to battery on a reload...
Hmmmm...Design flaw, maybe?:p



July 6, 2004, 01:35 PM
It sounds like it COULD be a weak mag spring, but it kinda sounds like it could be the recoil spring too... except when the recoil spring is too weak, it generally won't even get the round stripped off of the mag and onto the feed ramp.

My best edumacated guess is the mag spring.

But this is all assuming it's not the shooter... limp-wristing tends to do the same thing.


July 6, 2004, 06:18 PM
Doc..........take away the prescription of http://www.pbase.com/image/30402448.jpg from the Glock.

July 6, 2004, 06:32 PM
What brand of ammo are you using ... often failure to go completely into battery is an ammo issue.

When was the last time this gun was cleaned? Dirty chambers are tighter then clean ones.

July 6, 2004, 06:40 PM
Ammo was Speer Gold Dot 230gr. JHP and S&B FMJ.

Happened with both kinds.

Gun is cleaner than your dinner plates after a spin in the dishwasher. :)

July 6, 2004, 07:20 PM
Okay...Okay...Check around, under, and behind the extractor for gunk, cack,
sand, grit, grease or gravy. See if it moves freely in both directions. Spray the area down with WD-40 and see if it gets better. A Glock should feed with a half-power recoil spring, since the throat is cut so deep into the chamber...Virtually zero probability of stem bind.

Check the rails for evidence of the plastic rollin' up into little rough spots.
Seen that happen on a H&K USP once. Hand-cycle it with the barrel out to feel any tight spots, and report back.

Standin' by...


July 6, 2004, 07:27 PM
Thanks Tuner. ;)

I detail stripped both my Glocks (neither of which were dirty, but did it anyway).

I'm pretty sure the problem was limp-wristing when I experienced the problem and then my girl was babying the gun, which caused her problems.

Badger Arms
July 6, 2004, 07:30 PM
Agreed on the extractor being the culprit. It's the only thing in the way of the round chambering like you say it should. If you are mechanically inclined, you can remove the extractor being careful not to lose the spring. If you don't have the tools or can't figure out how to remove the extractor, you really shouldn't try to do it... might be beyond your abilities.

At any rate, clean the heck out of the extractor and all of the recesses then reassemble. 90% of the time, that will solve your problem. You might also have to contour the extractor so that it slips over the case every time. This is really a job for a gunsmith or somebody that has a spare extractor ready to go back into the gun if you screw it up.

July 6, 2004, 07:36 PM
No offense Badger, but have you ever handled and stripped a Glock?

I do not believe that there is a semi-auto pistol on the market that is easier to FULLY strip than a Glock.

As I said in the post directly above yours, I detail stripped the slides of both my 27 and 30 (this involves removing the extractor), and no, neither of them were dirty since they've had less than 100 rounds through them since the last time I detail stripped them 6 months ago.

Again, as I also said above, I think the problem was due to my limp-wristing and my girl babying the gun when she was trying to rack the round into the chamber.

Thanks guys. :)

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