1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Glock still have unsupported chambers?

Discussion in 'Handguns: Autoloaders' started by Fatelvis, Jul 15, 2012.

  1. Fatelvis

    Fatelvis Well-Known Member

    Has Glock started using fully supported chambers, or are they still unsupported? Also, was it only 40S&Ws that had the problem with KBs? Thanks-
  2. NG VI

    NG VI Well-Known Member

    No pistol has a fully supported chamber, at least not any conventional service pistols. Glock increased the amount of chamber support in their .40 line something like fifteen years ago.

    And any gun is likely to blow up if you fire again with a squib stuck in the barrel, or if you fire it with a double charge of propellant, not just Glocks. Remember who has the largest market share (Glock) and especially who has the largest share of pistols in the hands of new shooters, like at academies, where they will be shooting a good amount and may be less likely to notice a squib.
  3. ku4hx

    ku4hx Well-Known Member

    For some interesting "KB" data, search this sight for instances of kb. Lots of scary pictures of various KaBooms.

  4. Fatelvis

    Fatelvis Well-Known Member

    Thanks NG. I take it you're a fan of Glocks, lol. I am not a fan of them, and am not familiar with them, but a friend of mine asked me about this, and I wanted to answer him accurately.
    Last edited: Jul 15, 2012
  5. DPris

    DPris Well-Known Member

    When I went through the Glock armorer's course not long after the GEN 4 came out, I asked if the new guns had addressed that chamber issue & was told they had not.
    The reason given was that it's part of retaining the feeding reliability.
    This came from a travelling Glock instructor I've known for well over 25 years & he's a very knowledgeable ex-cop & longtime firearms instructor, former member of Jeff Cooper's outfit.

    Like the Glocks or not, their chambers ARE more unsupported (or less fully supported) than many other brands.
    And, they remain so.

    And, it's not just the .40s.
  6. mesinge2

    mesinge2 Well-Known Member

    While I am not a Glock fan (grip shape issue) and don't currently own one. IMO, the KB incidents are seen more often with Glocks for a couple of reasons. Simply, they are quite popular and there are probably more glock owners than M&P and XD owners as NG VI pointed out. Second, IIRC Glock states in the manual "don't use reloads". They say this because of the polygonal rifling and many reloads are made with lead. Polygonal rifling does not take leading well. Finally I think a lot of mall ninja types buy a Glock in 40 because it is 'tacticool' and they know nothing real about guns. So, they abuse it with double charged reloads, improper maintenance, improper ammo, etc.

    Last edited: Jul 15, 2012
  7. atomd

    atomd Well-Known Member

    The newer Glock barrels have the same or very close to the same support as almost all the other popular .40 service pistols. Their chambers are a bit loosened up compared to some though. There's plenty of pictures online of a newer .40 glock barrel next to barrels made by sig, s&w, etc and you can't tell the difference by looking at them like you could with the older barrels. Some of the older ones had less support. When I put a gen 2 up next to a gen 4 I can see the difference and I can also see the difference in the ejected brass as well. Do I feel unsafe shooting reloads through the gen 2? Of course not.
  8. Fatelvis

    Fatelvis Well-Known Member

    Hmmm.....still wondering. Guess an email to Glock is in order. Thanks for the input Guys!
  9. StrutStopper

    StrutStopper Well-Known Member

    I've heard you shouldn't shoot .40 reloads in a glock. I don't own one, but a friend of mine does. He heard the same thing when he bought the gun. I do reload .40 S&W, so when we go to the range I collect his brass. There is always a bulge at the bottom of the case near the head. I've heard this referred to as "glocked brass." When I run these thru the resizing die, they come out looking okay. I'm not sure I'd want to shoot them thru a gun that doesn't more fully support the case like the one that I assume caused the bulge in the first place. In a gun with a more fully supported chamber these reloads would be less likely to rupture near the case head. I'm not a Kaboom expert nor do I play one on TV, these are just my thoughts and observations. I'm sure if this is way off base someone more knowledgeable than I will chime in.
  10. Gtscotty

    Gtscotty Well-Known Member

    I believe I had read several places that Glock had increased their chamber support in the late 90's or early 2000's, I'm not sure though. I do know that my G20 stock barrel has just as much chamber support as my Lone wolf barrel, which is supposed to have pretty good chamber support. The Glock chamber is definitely a little larger, and cases that have been fired in the standard chamber expand more than those fired in the LWD chamber. Lots of people reload Glock, most of them seem to use a factory crimp die with the innards removed to iron out minor "Glock smiles". If the Glock smiles are too large, the brass is pretty much shot.
  11. hentown

    hentown Well-Known Member

    The Gunzone is a terrible source for reliable information. They been caught in so many lies and misrepresentations that they should be banned from the internet!!:cool:
  12. GLOOB

    GLOOB Well-Known Member


    This question comes up every few weeks, and the same misleading half-truths are posted over and over. It's to the point where I'm surprised useful information still manages to get posted once in awhile.
  13. WardenWolf

    WardenWolf member

    The vast majority of kabooms come in .40 caliber Glocks. The problem is twofold. Part of it is Glock's fault, and part of it is due to a flaw with the .40 S&W round. The .40 S&W round is unusually vulnerable to bullet setback, which can dramatically increase chamber pressure if the bullet is pushed in even slightly. This hugely exacerbates the problems with the Glock's unsupported chamber, and makes case blowouts much more likely. As a result, I consider .40 caliber Glocks a Bad Idea. They're usually fine in almost any other caliber, but .40 should be a no-go.
  14. WYOMan

    WYOMan Well-Known Member

    Until someone can produce a chart that shows every centerfire firearm produced, the number of failures for each one, and a list of the causes of the failures, it's only conjecture to say that one manufacturer has had more than another. With the internet, news papers, and the 24 hour news, you would think that murders are higher now than ever before, but statics show they are down. Every time someone has any kind of problem with a firearm or ammunition, it's on you-tube, or someone's blog within minutes, and the stories fly about how people better stop using them. Does the show about the Remington 700 trigger ring any bells?
  15. 918v

    918v Well-Known Member

    No it's not.

    Bullet setback is caused by incompetence.
  16. Balrog

    Balrog Well-Known Member

    It is funny to me that its OK to spend money to have a 1911 chamber throated to make it more reliable, but when Glock does it, its a manufacturing defect.

    I like 1911s and Glocks, and I like loose chambers in both.
  17. Weevil

    Weevil Well-Known Member

    Yes Glock has increased the chamber support on the .40s in the last few years.


    And yes it was only a documented issue with the .40s.
  18. hentown

    hentown Well-Known Member

    That's a truly absurd statement.
  19. 918v

    918v Well-Known Member

    How is it absurd? It it the gun that causes setback or the idiot who made the reload? use your head.
  20. atomd

    atomd Well-Known Member

    Setback is caused from improper of lack of crimp. True the design of the .40 cartridge might cause more movement of the bullet in the case when compared to say 9mm if both were assembled incorrectly....but it is still a problem with whomever crimped that round and not the gun. To say that you shouldn't shoot a reload through a Glock is silly. It's no different than any other .40 pistol out there as far as reloads go. The only debate is lead in a Glock and that's a whole different debate altogether. I have a .40 Glock that hasn't had one factory round though it....only reloads. It's only unsafe on the internet. Thankfully I shoot that pistol in real life instead.

Share This Page