[John Polosky]

Where is the model number of the magazine follower on the follower?

I was using 4 9 round magazines and 1 13 round magazine in a range session yesterday and had 4 FTFs out of 77 rounds.

I did not notice whether it was one or all or a mix of the magazines when the failures occurred. I did reload the mags several times. 40 S&W American Eagle 180 grain flat nose.

The rounds appeared to be seated in the magazine Simply racked the slide and kept shooting.

The magazines have been used quite a bit over time and had given no problem with several hundred rounds AFTER I fixed several problems that were inherent in the early times that I used the gun. The gun has been flawless since the :"fix" and over 1200 ish rounds of mostly 40 S&W and 357 Sig and 9mm. I use 9mm mags and 357 sig mags when shooting those calibers.

My 40 magazines had the caliber and either a 9 or a 10 on the follower.Not sure that is the model number or what!
.

 

[Crane1]

9 & 10 are the revision numbers of the follower. Your problem may be caused by the springs and not the followers.

 

[John Polosky]

9 & 10 are the revision numbers of the follower. Your problem may be caused by the springs and not the followers.

I was also thinking that.

I will also try to determine if one particular magazine is problematic first and, if so, either take the magazine out of my practice rotation or get some education on replacing the spring. I do not use these magazines for carry.....unless the idiots clamor for 10 rounds or less. Might purchase a couple of new 9 round magazines.for grins and giggles.

Thanks for your reply. Just wanted to verify what I thought. . .

 

[ActanonVerba70]

Where is the model number of the magazine follower on the follower?

I was using 4 9 round magazines and 1 13 round magazine in a range session yesterday and had 4 FTFs out of 77 rounds.

I did not notice whether it was one or all or a mix of the magazines when the failures occurred. I did reload the mags several times. 40 S&W American Eagle 180 grain flat nose.

The rounds appeared to be seated in the magazine Simply racked the slide and kept shooting.

The magazines have been used quite a bit over time and had given no problem with several hundred rounds AFTER I fixed several problems that were inherent in the early times that I used the gun. The gun has been flawless since the :"fix" and over 1200 ish rounds of mostly 40 S&W and 357 Sig and 9mm. I use 9mm mags and 357 sig mags when shooting those calibers.

My 40 magazines had the caliber and either a 9 or a 10 on the follower.Not sure that is the model number or what!
.

From Glock Armorer’s Manual

Observed Problem – Failure to feed

Probable Causes -

1. Weak magazine spring
2. Weak recoil spring
3. Underpowered ammunition
4. Shooting with an unlocked wrist
5. Dirty Chamber
6. Dirty magazine
7. Tight extractor
8. Magazine not properly inserted
9. Deformed magazine (magazine sides or lips deformed)

These are not exclusive. At least a good place to start "trouble-shooting".
I've seen #1&2 above to be the most common. Of course an inexperienced shooter might be shooting with an unlocked wrist (with all the shooting you described - I doubt that is your problem).

 

[voyager4520]

IMO G23 mags are undersprung, they use the same 9-coil spring used in G26/27 magazines, as do G19 and G32 mags. For me like clockwork after owning a G23 mag for a year and keeping it loaded for about half that time it'll start failing to feed. I replaced the springs in my G23 mags with 10-coil springs for G17 mags and they're perfectly reliable years later. I don't know if they'd still hold 13 and work reliably with +1 in the chamber because I only load them to 12. If you can't find oem springs I'd recommend Wolff Gunsprings +10% power mag springs, all of their Glock mag springs are essentially +1 coil of whatever mag they're meant for, so a G23 spring from them would be equivalent to an oem G17 mag spring.

When .40 Glocks were having FTF's with lights attached Glock changed the G22 mag springs from 10-coil to 11-coil to fix it but they never "upgraded" G23 mag springs.

The 9-coil springs in G27 mags are plenty strong, if those are causing problems the most I'd do is replace the springs with new 9-coil springs, and maybe update the followers to #10 but #8 and #9 should work fine.

Maybe the FTF's are being caused by something else if it happens with G27 mags. Weak recoil spring, gunk buildup around the extractor. A detail strip cleaning of the slide and its parts with q-tips and a mild cleaner might fix the problem, just don't leave excess oil behind. Wipe everything as dry as possible before reassembling the slide. I use Hoppe's Elite Cleaner spray or Slip 2000 725 for detail strip cleaning.