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Posted: 7/13/2015 11:32:31 AM EDT
[#1]
Maybe you could share some details like what specific brand and load of ammo, what magazines you were using, what lubrication had been done to the pistol, were there any modifications or parts replacement with the guns or mags prior?
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Posted: 7/13/2015 11:47:25 AM EDT
[#2]
Good thinking on giving specs! The ammo is new Speer LE standard pressure 230gr Gold Dot JHP. The magazines were standard Glock-brand original equipment 13-rounders. In fact, both the gun and mags are all bone stock OE, with no modifications, whatsoever. As far as cleaning and lube, I clean with military Breakfree CLP, and lubricate with Militec-1. That said, the gun was quite dirty. Before that range trip it had had 200-500 rounds, and had been on a long distance wilderness survival hike exposed in a thumb-break holster to rain, mud, grit, and leaves since the last cleaning/lubrication. Now I took it apart after the hike to check for barrel obstructions, and it did not have any mud in it, but I did not clean it after that.
My AR-10 and M4 have held up to that kind of adverse condition treatment for years and have literally never jammed in thousands of rounds, so I kind of figured my Glock should be able to handle the same. Hopefully this elaboration will help people diagnose what is going on for me. Thanks! |
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Posted: 7/13/2015 11:51:53 AM EDT
[#3]
Posted edited, warning sent to user - AJE
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Posted: 7/13/2015 12:09:50 PM EDT
[#4]
Your problem sounds like weak mag springs.
Buy some Wolff extra power mag springs and load to 12+1. Everyone will flame me for that, but I've seen the issue with a couple of 21s. |
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Posted: 7/13/2015 12:13:15 PM EDT
[#5]
Quote HistoryQuoted:
edited, AJE As far as limp-wristing, my Colt Delta Elite with full-power Underwood ammo and my S&W Model 29, both of which I shoot regularly, would have to disagree with your assessment of how this 6' 1" weightlifter can handle heavy-kicking pistols! |
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Posted: 7/13/2015 12:30:54 PM EDT
[#6]
Sounds to me like an isolated mag problem. Make sure and mark your mags so you can keep track of that mag and see if it happens again.
But did I understand what you originally posted correctly? You have carried it with that ammo for the last 2 months and this is the first time you have shot that ammo in that gun? Or have you been carrying it with FMJ for the last 2 months? 
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Posted: 7/13/2015 12:33:24 PM EDT
[#7]
Quote HistoryQuoted:
COC-AJE This isn't GD tough guy. If you don't have anything meaningful to post, please refrain from posting at all...especially trashing other memebers. OP. Sounds like you've shot enough to have already broken in the mag springs. At first I thought maybe there was a lot of pressure on the round in the magazine causing it to drag against the mag lips and not properly pop under the extractor. This Is going to sound expensive but if it were me I'd run another couple hundred rounds of what you plan to carry in the magazines you intend to do so. My G21 has never jammed but I'll admit I've only shot 50 rounds of the JHP that I carry, and thousands of rounds of FMJ. If you continue to have issues, the first thing I would do is replace the mag springs. |
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Posted: 7/13/2015 12:38:58 PM EDT
[#8]
even with a Glock, I put the high buff on the feed ramp, chamber edge radius, and roof of the chamber and hood... just a polish with rubberized Cratex bullet wheel in the direction of bullet nose travel,and then buff with the muslin wheel and some red rouge... run a ceramic stone over the bolt face and break the edge of the extractor...
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Posted: 7/13/2015 12:41:29 PM EDT
[#9]
Quote HistoryQuoted: Sounds to me like an isolated mag problem. Make sure and mark your mags so you can keep track of that mag and see if it happens again. But did I understand what you originally posted correctly? You have carried it with that ammo for the last 2 months and this is the first time you have shot that ammo in that gun? Or have you been carrying it with FMJ for the last 2 months? |
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Posted: 7/13/2015 12:45:30 PM EDT
[#10]
That's some interesting diagnosis about it being mag springs that are too weak. The only mag that had this issue was the newest one which I had not let sit for a few weeks with a full load like I did with my others. It did seem to smooth up, as I exclusively used it for the remainder of the two boxes, and in those last 75-80 rounds of Gold Dots it never malfunctioned again.
Regardless, I have an additional 100 Gold Dots and another 100 Remington UMC JHPs which I will run through the gun this weekend to see whether the problem is resolved. |
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Posted: 7/13/2015 12:48:19 PM EDT
[#11]
After reading this I'm going to have to run some defensive rounds through my 21. I've only shot FMJs so far with no hint of a problem.
Paul |
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Posted: 7/13/2015 1:02:08 PM EDT
[#12]
A one percent or less malfunction rate - was not to long ago youngsters a reliable semi auto with hollow points was a near impossibility ( I call 30 years ago not to long ago)
Anyway I would not take a single malfunction as a cardinal sign of anything. Now if you develop a pattern of malfunction that is when you investigate Agree with the track mags and make sure it is not a bad mag. Try some other hollow points- some guns have preferences Never judge a gun by performance with a single type of ammo as the issues may be ammo not gun related. Unless you have ten cases of a particular defense load already or get it free from an agency or are mandated to carry a particular round by regulation , do not get wedded to a particular load. |
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Posted: 7/13/2015 1:07:45 PM EDT
[#13]
If you are in search of a perfect 100% reliability rate handgun , best stick to a base ball bat- any gun can have an inexplicable malfunction for so many multiple reasons which is why malfunction drills are taught. Do not go chasing your tail - shoot and track your issues and if you end up 500 round later with no malfunctions soldier on, realizing malfunctions can still occur and require immediate action
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Posted: 7/13/2015 1:55:01 PM EDT
[#14]
OP described a bolt over base malfunction which is the result of a weak mag spring.
Not break-in, not because the gun polished, not because somebody else's 1911 didn't jam, etc. |
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Posted: 7/13/2015 2:01:39 PM EDT
[#15]
These are some very helpful responses so far; thank y'all very much! I think it may just be a single freak malfunction. After all, it ran almost 100 of the same JHPs after that through the magazine in which the jam occurred with no other issues.
On the idea of giving it a polish in the chamber and feed ramp, what say ye about the wisdom of doing that. I am leery of doing that as I don't want to mess anything up, and I hear Glocks are as perfect as they are going to get right out of the box. However, I have polished feed ramps on some old surplus autos (Tokarev, Makarov, PA-63, Hi-Power) with good results. Provided I just use Flitz Polish and Qtips, and clean all the polish off afterwards, is there a reasonable chance I might hurt my gun doing that? |
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Posted: 7/13/2015 2:27:33 PM EDT
[#16]
Keep shooting maybe it was just a fluke..... Do not just start replacing shit 1 round to have a misfeed is hardly an unreliable gun. 1 round out of every mag is shit happens lots of factors could come into play as to what caused it....... thumb riding the slide lock, limp wrist, bad round was the OAL different, bad previous round maybe the slide did not go fully back, thumb dragging the slide slowing it down, Jupiter and Venus planetary alignment with Mars. Shoot it more mark the mag that misfed and see if it occurs again. 1 data point is not enough to make a determination.
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Posted: 7/14/2015 12:33:48 AM EDT
[#17]
i think glocks QC is starting to slip, i have owned 4 different glocks over the years and currently have a gen 3 17 that has been flawless. On the other hand i have a gen 4 glock 26 that has had 4 failures to feed in 400 rounds
 im considering dropping my glocks and getting MP's
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Posted: 7/14/2015 1:25:44 AM EDT
[#18]
While I have not shot any HP ammo, I have put over 4k rounds through my G21 Gen4, since January and have not had any issues. I did install a Strom Lake barrel, as I shoot mostly cast/plated bullets. I would shoot the HP ammo more and watch lot numbers. It might be possible that thee was a round that was not up to standards. Did you strip the one mag and ensure that the insides are good and clean?
I do have some 10 round mags for my G20sf that, do not like to feed the last round, but I only use them for practice now. I carry my 13 round mags for daily carry and for when it really counts. |
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Posted: 7/14/2015 2:31:21 AM EDT
[#19]
It's a small sample size but 2 of 3 21s I have used were unreliable.
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Posted: 7/14/2015 9:50:50 AM EDT
[#20]
In what way? I have seen several G21's at the range, that I am an RSO at, and have not seen any issues with them. Most of the shooters that I work with really like the G21/G41 45 ACP's.
Quote HistoryQuoted:
It's a small sample size but 2 of 3 21s I have used were unreliable. |
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Posted: 7/14/2015 1:44:32 PM EDT
[#21]
One single malfunction? I wouldn't even bat an eye.
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Posted: 7/14/2015 1:50:21 PM EDT
[#22]
Quote HistoryQuoted:
In what way? I have seen several G21's at the range, that I am an RSO at, and have not seen any issues with them. Most of the shooters that I work with really like the G21/G41 45 ACP's. Quote HistoryQuoted:
In what way? I have seen several G21's at the range, that I am an RSO at, and have not seen any issues with them. Most of the shooters that I work with really like the G21/G41 45 ACP's. Quoted:
It's a small sample size but 2 of 3 21s I have used were unreliable. Doubles and stovepipes. |
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Posted: 7/14/2015 1:59:46 PM EDT
[#23]
Quote HistoryQuoted: Doubles and stovepipes. Quote HistoryQuoted: Quoted: In what way? I have seen several G21's at the range, that I am an RSO at, and have not seen any issues with them. Most of the shooters that I work with really like the G21/G41 45 ACP's. Quoted: It's a small sample size but 2 of 3 21s I have used were unreliable. Doubles and stovepipes. What ammo? I recently got an LE trade-in G21 gen4. First time I took it to the range I experienced some malfunctions, but I'd be willing to bet a month's paycheck that it's my reloads. |
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Posted: 7/14/2015 4:38:56 PM EDT
[#24]
New magazine. Gotta wonder if it had maybe a piece of casting flash . Just a wild guess here.
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Posted: 7/14/2015 4:52:56 PM EDT
[#25]
In my previous life I was deputy sheriff. we carried the G21SF. I never saw one jam on the range, I know mine never did in thousands of rounds. We spent a fair amount of time using duty ammo as well. I now sell guns for a living and I sell a lot of G21 Gen4 pistols. I hear more bad feedback from shooters about the Gen4 pistols than I do about any previous generation Glocks regarding reliability, mostly during the so called break in period. I am also a Glock armorer, I know there are subtle differences between the Gen3 and Gen4 guns but I don't understand how they could translate into a decrease in reliability. Previous posters have mentioned the magazine as the culprit, I would tend to agree, especially as the malfunction occurred at the last round or close to it. I would continue to break that mag in and track any issues as you go. I still think Glock is a solid, reliable pistol. I still carry a G21SF and it is the one pistol out of many that I own that I would choose over all others if I was limited to one handgun.
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Posted: 7/14/2015 8:26:20 PM EDT
[#26]
1/4 Glock mags I have for my 20sf is problematic. I replaced it and had no further issues.
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Posted: 7/15/2015 7:18:43 PM EDT
[#27]
I was getting ready to write a review/synopsis on my Glock 21 Gen 4 raving about it when I saw your post. I carry mine on duty and in 10,000+ rounds I've experienced 3 malfunctions and all were ammo related (3 Remington 230g Gold Saber rds from same lot that was very old, all would not fire after multiple primer strikes). It's been boringly reliable. I've shot 185g-230g FMJs, +P defense loads, 160g frangible ammo (1,250rds of that stuff), Federal HSTs, Speer Gold Dot 230g (current issued duty rd, same you had a malfunction with), Remington Gold Saber, Hornady 230g +P JHP, etc. I would call yours a fluke, possibly a bad mag. If it's a consistent problem with various JHPs and mags then I would just contact Glock.
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Posted: 7/17/2015 10:23:09 PM EDT
[#28]
I'd say it's a fluke but use that mag some more and see if that's the problem.
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Posted: 7/19/2015 11:58:38 AM EDT
[#29]
Put at least 200 rounds through the gun before you decide....
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Posted: 7/28/2015 4:48:19 PM EDT
[#30]
Thanks for the input, y'all!
I have just put my fears to rest about reliability. My wife lets me go to the range once every 2 weeks, and so last Friday I put 200 rounds of Gold Dot through the pistol. I hadn't cleaned or oiled the Glock since shooting it before, and even with very rapid firing, it was 100%. Additionally, something I forgot to mention was that when the malfunction occurred, I was testing accuracy from a bench with a very hard rest on which I braced the frame very firmly. I gather that can induce malfunctions in almost any semi auto. |
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