PDA

View Full Version : off center primer strike



turbolag23
03-04-2011, 11:59 AM
I purchased a used Glock 27 for an EDC. I'd say at max I've put 3000 rounds (WWB, Federal, Blazer Brass, UMC) through the gun. Within the past few months I started getting a number of off center and light primer strikes. I think one is bad for a carry gun but I was up to five to eight in a 100 round range trip.

I figured it could be a weak recoil spring so I replaced that. My next range trip I still had one off center strike. My next thought is to replace the extractor but I don't want to keep throwing parts at it that may not fix the issue.

Any thoughts on what else it could be or where I should go from here? Any advice would be appreciated. I will try to provide additional details to the best of my ability.

Thanks in advance,
Matt

YVK
03-04-2011, 05:42 PM
Matt, I would look at replacing a striker spring - I know for certain that worn or light striker spring can cause light strikes. Another possibility is trigger spring, but I think it is less likely to be a problem with Glocks.
I've had some problems with light strikes with my Glock 19. The recommendations that I received then were to make sure that striker spring was fresh, the firing pin channel was clean, and spring cups were installed correctly.
It should also be noted that some ammo just has hard primers and there is nothing you can do about it. My A-Zoom snap caps took a leave of absence when I shot Wolf ammo: each practice session with Wolf turn into ball and dummy or malfunction clearance session.

turbolag23
03-04-2011, 08:31 PM
YVK, thanks for the suggestion. Before I changed the recoil spring I swapped the firing pin from my g23 and it still had the same issue but not as frequent. Probably should just replace all the springs to start.

The firing pin channel is as clean as I can get it and I have taken the spring cups off and on just to check. I thought it could be an ammo issue as it mostly happened with the boxes of Federal from Walmart but also got one with WWB round and one or two Blazer Brass rounds.

SecondsCount
03-05-2011, 01:04 AM
I am a little out of my league here with Glocks but could it be a recoil spring issue where the slide is getting pulled back a small amount when the trigger is pressed?

willowofwisp
03-05-2011, 01:08 AM
I am a little out of my league here with Glocks but could it be a recoil spring issue where the slide is getting pulled back a small amount when the trigger is pressed?

Thats what we originally thought (i am friends with turbolag) but he replaced the spring and it still happened, seems to happen after about 50 rounds from what I remember.

SecondsCount
03-05-2011, 11:31 AM
Thats what we originally thought (i am friends with turbolag) but he replaced the spring and it still happened, seems to happen after about 50 rounds from what I remember.

Could the spring be binding?

It has to be something that is not letting the gun to go fully into battery every time. I can pull the slide back on my G19 about .030" and the barrel will drop about .025" and yet the gun will still fire.

turbolag23
03-05-2011, 12:24 PM
that was my first thought, maybe the spring was too weak to return to battery so the barrel was dropped a slight bit and firing pin hitting high. after replacing the spring and it still happening my thought was maybe the extractor is damaged and rounds are not being fed high enough causing the firing pin to hit high. all ammo fired the second time around.

Kyle Reese
03-08-2011, 12:35 PM
Since Feb 2010 (when the slide on my G 19 flew into a dirt berm at a Get SOM class), all of my 9mm Glocks are overhauled when they hit around the 5,000 round mark. New pins, extractor & springs. Cheap insurance, IMHO.

I would suggest replacing all of the springs (and extractor) if you are able to do so, rather than trying to address the issue in a piecemeal fashion.

Just my 2 kopecks.

boyscoutg36
03-08-2011, 12:55 PM
What is the condition of your striker channel liner? Sometimes if those get scored, they need to be replaced. Also, I assume you don't oil the striker assembly, that can draw crud in fast too. There is one other thing I would inspect, the plunger. If the timing is off slightly the striker could be impacting the plunger and causing it to hang up, you would see some wear on the plunger which is abnormal.

turbolag23
03-08-2011, 01:10 PM
I would suggest replacing all of the springs (and extractor) if you are able to do so, rather than trying to address the issue in a piecemeal fashion.


I was thinking that as well, I recently received my armorers cert so I'm making a list of parts I want to order. the local gun store had the recoil spring but I didnt want to buy all of the parts from them if I didnt have to.


What is the condition of your striker channel liner? Sometimes if those get scored, they need to be replaced. Also, I assume you don't oil the striker assembly, that can draw crud in fast too. There is one other thing I would inspect, the plunger. If the timing is off slightly the striker could be impacting the plunger and causing it to hang up, you would see some wear on the plunger which is abnormal.

the striker channel liner, striker itself, and plunger dont show any abnormal wear that I can see. the only interesting wear spots are the peening on the slide and extractor. the gun is free of lube except the minimal amount put on the slide rails and barrel.

boyscoutg36
03-08-2011, 11:20 PM
A picture may help, peening on an extractor may be a sign of the lockup issue you mentioned. A .40cal Glock firing out of battery can be a terrible thing, I would disassemble the plunger and extractor and make a close examination of those parts. Also check the trigger bar to see if the lifter that engages the plunger is clean and the correct height, a drop of dykem or permanent marker can show you where it is engaging and how much metal/metal contact you are getting.

turbolag23
03-09-2011, 07:36 AM
I will work on getting some pictures after work today. guess I'll have to work on those close up photography skills.

turbolag23
03-09-2011, 06:26 PM
is this beat up enough to cause firing issues?

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8381.jpg

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8380.jpg

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8379.jpg

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8382.jpg

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8383.jpg

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8384.jpg

peening is actually worse on my g35, happens to all the 40sw i guess
http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8385.jpg

JDM
03-09-2011, 06:35 PM
is this beat up enough to cause firing issues?

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8381.jpg

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8380.jpg

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8379.jpg

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8382.jpg

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8383.jpg

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8384.jpg

peening is actually worse on my g35, happens to all the 40sw i guess
http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8385.jpg


This adds nothing useful to the thread, but those are very good photos.

turbolag23
03-09-2011, 06:39 PM
attempted inside the firing pin channel

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8389.jpg

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8390.jpg

http://i869.photobucket.com/albums/ab259/CWPspeed3/G27%20issues/DSC_8386.jpg

turbolag23
03-09-2011, 06:41 PM
This adds nothing useful to the thread, but those are very good photos.

thanks, someone asked for pictures and i was hoping they would help

boyscoutg36
03-09-2011, 10:36 PM
Those were great photos, the striker channel liner looks great and the plunger looks fine too. I would replace the extractor and spring assembly first, the bottom of your extractor is starting to chip and look worn. I forgot to ask, it the barrel going in and out of battery freely? I hope this helps, if you want to do this on the cheap just call Glock and see if what they may do for you. They have good customer service, not as good as S&W but pretty close.

turbolag23
03-10-2011, 12:51 PM
the only thing that looks really beat up is that extractor. the barrel and slide seem to return to battery fully and easily, I dont notice it getting hung up on anything obvious. I probably should have taken some pictures of that as well.

photography is a hobby of mine so it was fun trying to set those up.

after i replace the extractor if it's still an issue i will give Glock a call. if possible i rather fix it myself without bothering with shipping it to Glock thats why i'm asking around the forums.

thanks for your help and suggestions.

ronnieboy_920
12-04-2011, 04:43 AM
the only thing that looks really beat up is that extractor. the barrel and slide seem to return to battery fully and easily, I dont notice it getting hung up on anything obvious. I probably should have taken some pictures of that as well.

photography is a hobby of mine so it was fun trying to set those up.

after i replace the extractor if it's still an issue i will give Glock a call. if possible i rather fix it myself without bothering with shipping it to Glock thats why i'm asking around the forums.

thanks for your help and suggestions.


turbolag23, were you able to identify the root cause to the off center primer strike issue with your Glock 27? I also have a G27 and just recently started experiencing the exact same problem; I'm getting a small number of off center and light primer strikes with my typical range ammo (WWB FMJ, Federal FMJ) that I've never encountered problems with before. Did the replacement of the extractor finally address the issue or did you end up having to send it back to Glock?

turbolag23
12-04-2011, 08:44 PM
turbolag23, were you able to identify the root cause to the off center primer strike issue with your Glock 27? I also have a G27 and just recently started experiencing the exact same problem; I'm getting a small number of off center and light primer strikes with my typical range ammo (WWB FMJ, Federal FMJ) that I've never encountered problems with before. Did the replacement of the extractor finally address the issue or did you end up having to send it back to Glock?

i swapped the extractor from my g23 and it seemed to work but unfortunately i didnt pursue the cause too much further. just after that i started carrying my g19c and havent really shot the 23/27 since.