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Are these 15-round magazines actual Glock-manufactured magazines, not KCl or some other brand?

Did you disassemble the 15-rounders for cleaning or something? I'm wondering if the magazine springs are in backwards.
 
Discussion starter · #22 ·
Are these 15-round magazines actual Glock-manufactured magazines, not KCl or some other brand?

Did you disassemble the 15-rounders for cleaning or something? I'm wondering if the magazine springs are in backwards.
Yes the 15 rounders are all Glock. I have not had them long enough to consider cleaning yet. I just started to switch over to Glock over the summer.
 
My guess is that there's too much force pushing up on the column of rounds and the RSA can't overcome the force. As you mentioned the problem goes away once the magazine gets down to 12 rounds. You could get a extra power RSA.
It works fine with the 10-rounders, so I think the problem less likely to be with the pistol and more likely to lie with the 15-rounders. I wouldn't want to over-spring the pistol and probably make it unreliable with the 10-rounders.

It's blowing my mind that you have to download the 15-round magazines to 12 rounds for reliable first round feed.
 
Just to review...

I’ve been having a failure to feed issue with my 26 Gen 5 when using Glock 19 magazines. It happens with Winchester White Box 115 grain and Hornaday 115 grain Critical Defense. I’ve not had an issue with the 26 10 round magazines. Once I do get the round chambered it functions flawlessly.
I’ve had the same issue with multiple mags. It is always when I am chambering the first round. When I’m firing it doesn’t occur. I’ve tried both slingshotting the slide and using the slide release to make certain I’m not riding the slide.
I’ve been giving them a good tap to make sure they are fully seated.
I’ve checked with different amounts of rounds in the magazine. It has happened as I go through trying to chamber a first round. I’ll clear the Miss feed and leave the round out and continue to attempt to chamber a round. It’s been a few times back but I think I had to go down to 12 rounds to get it to chamber.
I asked one of the RSOs about it. They pulled out 15 dummy rounds and couldn’t duplicate the issue. When I got home I tried with the Hornaday and duplicated the issue.
the 15 rounders are all Glock. I have not had them long enough to consider cleaning yet.
Is the flange of the recoil spring assembly marked with a "0", an "8", and a "2"?

I assume the 15-round magazines have been problematic from the start...?

Can you take some photos of the 15-round magazines, to include the number on the top of the follower?
 
For safety, I would suggest not playing with live rounds at home.
Apart from the possibility of an ND, be careful about function testing with live ammo in a location where you can't discharge the gun safely or legally. You don't want to end up with a gun locked up on a live round slightly out of battery or some other such drama.
 
Interesting issue.

I have a G26 gen 3 that was my off-duty gun. Qualifications with it since 2006 was twice a year, 50 rounds each qualification. Magazine used was the OEM 10-rounder in the gun, with the remaining 40 rounds loaded in 3 G19 mags. Never had an issue.

Yes, I got that your G26 is a gen 5. What I'm getting at is, use of G19/G17 mags as reloads for the G26 is likely common among the current crop of LEOs who have gen 5 pistols. But AFAIK, that's not been a similar issue reported.

What makes it more interesting is that this issue should really not be too difficult to diagnose.

So when you experience a FTF like in your photo, can you hand push (gently) the slide/bullet into battery? Or is it jammed (improper angle of bullet in chamber, etc...) that you cannot?
 
Discussion starter · #29 ·
Interesting issue.

I have a G26 gen 3 that was my off-duty gun. Qualifications with it since 2006 was twice a year, 50 rounds each qualification. Magazine used was the OEM 10-rounder in the gun, with the remaining 40 rounds loaded in 3 G19 mags. Never had an issue.

Yes, I got that your G26 is a gen 5. What I'm getting at is, use of G19/G17 mags as reloads for the G26 is likely common among the current crop of LEOs who have gen 5 pistols. But AFAIK, that's not been a similar issue reported.

What makes it more interesting is that this issue should really not be too difficult to diagnose.

So when you experience a FTF like in your photo, can you hand push (gently) the slide/bullet into battery? Or is it jammed (improper angle of bullet in chamber, etc...) that you cannot?
I can’t push it forward which is what is baffling me. I have no problem clearing the mis feed. I am being very careful with this. I did it one time just to check if I was having the same issue with another brand, and shape of round.
 
Discussion starter · #30 ·
Just to review...








Is the flange of the recoil spring assembly marked with a "0", an "8", and a "2"?

I assume the 15-round magazines have been problematic from the start...?

Can you take some photos of the 15-round magazines, to include the number on the top of the follower?
Yes the issue has been occurring with the 15 round magazines since I purchased the gun new.
I will get pictures of the magazines tomorrow and post them. They are Gen 5 magazines.
 
For the hell of it I tried it today w/ my 26 Gen 5 and several G19 mags. The 26 has less than 200 rounds and is about 1 year old bought new., I used new and old OEM Glock 19 mags and ammo from different manufactures including Winchester WB. I couldn't duplicate the problem. I was at a private range when doing he test.

Michael
 
You don't want to end up with a gun locked up on a live round slightly out of battery or
Worse is a chambered live round refusing to eject in administrative handling. Which has happened once in my Gen5 G19.

(Gen5 chambers are a little tighter.) Had to put the slide muzzle down in a cushioned vise and give the frame a big OOMPH down.
I have a 9mm Colt CG that will chamber and fire 147 grain but, no, you can’t eject that loaded round.

Ugh.
 
Worse is a chambered live round refusing to eject in administrative handling. Which has happened once in my Gen5 G19.

(Gen5 chambers are a little tighter.) Had to put the slide muzzle down in a cushioned vise and give the frame a big OOMPH down.
I have a 9mm Colt CG that will chamber and fire 147 grain but, no, you can’t eject that loaded round.

Ugh.
It's good to keep a hefty stick around, in case you can't break it free with your hands. But yes, this is definitely a potential problem with new/tight guns.
 
Discussion starter · #36 ·
Just to review...








Is the flange of the recoil spring assembly marked with a "0", an "8", and a "2"?

I assume the 15-round magazines have been problematic from the start...?

Can you take some photos of the 15-round magazines, to include the number on the top of the follower?
yes the flange has the 0, 8, 2
 
I suspect the problem has to do with the Gen 5 breechface cut, which is a shallow channel milled into the corner of the breechface opposite of the extractor.

The failure symptom is nearly identical to using Shield Arms 15 rd magazines in Gen 5 G48s. On some pistols, the Shield Arms magazine experiences excessive front to back wiggle when seated. The wiggle interferes with the case rim feeding into the breechface cut and the action jams exactly as depicted in your photos.

There may be enough front to back wiggle with the G19 magazines to cause this problem with your particular pistol. In addition, the G19 magazine's fully loaded spring pressure may contribute to the failure, which could explain why downloading the magazine clears the problem.
 
Don't use the slide "release" (its a slide "lock") to chamber first round.
If we’re going to be nomenclature nazis, what you’re referring to is the slide STOP. The slide LOCK is what keeps the slide attached to the rest of the pistol. ;)
 
It looks like the the cartridge is only half way in the chamber due to the lack of the sufficient momentum of the slide… In other words, it seems it is almost like a really bad case of FTRTB instead of FTFeed (or “nose dive”)….

Q.1 When you chamber the first round from a fully loaded 15-rounder mag, are you releasing the slide with a sufficient force (and not riding the slide)?

*The top round in a fully loaded cartridge is usually more tightly held in the magazine, and thus requires more force for the slide to strip it from the magazine and chamber it.

Q2. When you chamber the first round from a fully loaded 15-rounder mag already in the gun, how are you holding the gun (the grip) in your strong hand? Is your pinky placed on the magazine body protruding from the grip?

*Using the protruding portion of the 15-rounder magazine as your “pinky rest” can change the angle of the long magazine held in the short grip of the G26 so the loading angle of the top round can become “flatter” (i.e., more toward “nose down”) just so slightly. Combined with “riding the slide” this can also increase the risk of feeding issues with the top round.
This. I can cause my G27 to malfunction if I put a noticeable amount of finger pressure on a G23/22 magazine inserted in the subcompact frame. It alters the angle in how the top round feeds causing a FTF. So I just don’t use the magazine as a pinky rest.
 
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