Posted: 12/13/2004 3:28:49 PM EDT
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Recently purchased several boxes of PMC ammo for an extended range sesson. Caused several misfires and worry that my nib Glock 21C was nothing more than a fancy boat anchor. Primers were not fully seated which produced light primer strikes. Firing pin contacts primer and instead of coming up against a solid, seated primer the firing pins inertia is bled off through the process of the pin pushing up agasinst the primer and seating it in the pocket where it belongs. When fired a second time there was ignition. Glock armorer confirmed nothing wrong with pistol. So next time you have a misfire, check ammo first. Especially if its PPC. Cheers, NAV |
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Sorry about that. I meant PMC. S&B Sellier and Bellot >sp were purchased at the same time and misfired as well. Even when shot with a range gun, a G31 (357 sig) I rented. These misfires were experienced with Glock compensated models, a 21C and a 31C. Called Glock and there fix was to give me a deal on an uncompensated barrel which I will take them up on. Would never use a Glock for a carry weapon however, not now. They have a lot of work ahead of them to prove their reliability to me. Once I get this problem worked out will use my 21,s and my G22 for target only, to save wear and tare on my real firearms. Will not carry a gun that is ammo specific. Can't do it. Just not wired that way. Going back to my 1911's, or perhaps will purchase a Sig 226. Corrected post, Thanks NAV |
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Nav, I don't think your Glock is ammo sensitive. I've had mixed results with PMC in my handguns and ARs. I think the new stuff is better but a few years ago I swore I would never use it again because it caused several failures in one of my ARs. I also had several failures in my old USP9 using PMC. However, this summer I picked up a case from my local dealer and all 1000 went off without a hitch. Then I tried a couple hundred rounds of their 9mm and it worked just fine. I've run several hundred rounds, each, of the following ammo through my G17 & G19. It should give you an idea that Glocks are not ammo sensitive. Winchester WB 115gr FMJ Federal Hydra-Shok 135gr JHP Remington UMC 115gr FMJ Corbon Pow'R Ball 100gr +P Speer Lawman 115gr FMJ Wolf 115gr FMJ PMC 115gr FMJ Magtech 115gr FMJ Winchester STX 147gr JHP Winchester WB 124gr FMJ Reloads (various weights) Both of my Glocks have over 3000 rounds through them this year alone so I'm confident in both using any type of ammo. I haven't tried any S&B but I'll pick some up next week and let you know what I think. My suggestion is to buy some good Winchester White Box and try that after you get your uncompensated barrel. In case you are wondering I keep a spreadsheet of ammo and rounds fired. Anal, I know but... |
+1 My G17 was tight! First round stove piped and I wasn't too happy with the way she ran until she had about 1500 through her. Now she's my favorite. However, I'm getting my Kimber today so I may have a new favorite in a month or so 
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Thanks for the info Guys, will suspend my final opinion until I meet the 1000 round suggested break in. Just never ran into this problem before. Have had a misfire on ocasion but never at the rate I have experienced with Glock. I hope your right. Will be taking the little lady to the range today to renew her CCW. Plan to run at least another 500 rounds through the Glock. Will keep you informed. NAV |
Wait, I'm confused  In your first post you clearly stated that the cause of the mis-fires were unproperly seated primers. Then you believed that the cause was due to the fact the G21 (and later the G31) were compensated? Since the G21 was new, did the G31 have any prior issues that were reported? If the G31 had experienced issues before then I can understand but if it ran great before then I'd have to assume the ammo is at fault. I recommend you try running some good old fashion Winchester White Box through your G21 and see how it performs. My USP compact wouldn't feed anything but 124gr (and higher) loads until she had 1000+ through it. Now it will eat anything but it just needed to be broken in I guess. |
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Just reporteed what I was told first by a Glock armorer, then by GLOCK who suggested an uncompensated barrel as the fix. Sorry to say that this really sounded ridiculous to me but at this point I was willing to try anything. Its fairly evedent however that neither one has a clue as to the actual cause of the problem. Came back from the range yesterday after firing an additional 500 rounds through it. The first 100 being the infamous PMC rounds. 21 Misfires out of one hundred. The rest (Winchesters) had no misfires. (Got to be the ammo as a few also misfired when shot through my uncompensated G21). Purchased another box of their PMC ammo with the same lot number to run through a 1911. Here in lies the true tes! If all go bang then I will either be getting rid of the Glocks or will handload specifically for the Glocks and religate them to the practice range only. Got to say though the Sig is looking better and better to me. Someting about and external hammer just seems to be more positive. I did ask the range if they have had any problems with their Glock compensated models. One guy told me that they had not and that the PMC ammo was good over all while another associate told me that PMC was garbage and that he recommened shooting Winchesters in All of the Gloicks they rent. Not what I wanted to hear. Still shooting toward the suggested 1000 round break in period though I have decided to go the extra mile and increase that number to two thousand, simply because of what I have heard here about the gun. Perhaps I am the one out of so many thousands who end up with this problem, we will see. NAV |
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I'm wondering if the firing pin channel is gunked up or something? I know the G21 is new but I wonder if the firing pin is being slowed down by crap in the channel? I agree that your Glock should fire any and all ammo but stick with WWB for now, until it loosens up a bit. I don't know about your area but around here WWB is cheaper than PMC, esp if you buy it from Wal-Mart in the value packs. I'd be willing to bet the 1911 will do just fine with the PMC ammo. If after a 1000 rounds this doesn't clear up get rid of the G21. |
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I own several Glocks and never had any problems with various brands of ammo. It fires anything you put in it from day one. It has since fired around 3,000 rounds. PMC ammo is cheap ammo and I have used it to with no problems. I believe in your case you got a bad batch if its firing other ammo with no problem. |
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It is reports like yours that have me willing to go the extra mile. I really do hope I can get to the bottom of this as I do like the feel of the gun when it functions properly. The first thing I did once I found a Glock armorer was to have him totally disassemble the gun, clean it and tell me what he saw, Everything checked out. Wednesday is my last day before Christmas shutdown. I will shoot up the last box I have of the PMC using a 1911 to see what happens. I am beginning to believe its in the design of internal hammer versus the external setup though that is causing the problem. Just have to find a way to prove it. In double checking the striker marks from the Glock and a 1911 I can see that the 1911 has an indentation that is nearly trwice as large and deep as the Glocks. Just have to shoot Winchesters for now I guess. NAV |
| I've run 2-3000 PMC through a G17, G19, & a G32 w/ no problems. Some through a G23, too. No problems whatsoever. All of the PMC I've bought was made here, don't know if it matters but apparently a lot of it comes from Korea. Switched to WWB a few years ago because it's easier to get. |
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I have never had a malfunction in any of my glocks. Never a single FTF or FTE.... and it has always gone bang when I pulled the trigger. Hell... I couldn't get them to malfunction if I tried. They required no break-in and functioned flawlessly from the get go. I always used quality factory ammo to target shoot with: Federal American Eagle Win Whte Box Speer Lawman It eats all of this with ease. I agree with M4arc... I think it is simply an ammo issue. |