This is a discussion on Glock-a-boom within the Defensive Carry Guns forums, part of the Defensive Carry Discussions category; Originally Posted by Rob99VMI04 Happens in every gun from every manufacturur. I see more guys in matches having Malfunctions and parts breaking with 1911's then ...
Any gun can Kb. Not sure the gunzone is a unbiased place to research Kb's. I had a Taurus PT 140 Kb. badly. Luckily , I got a few small cuts only.
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Maybe I overlooked it above, so again ask the question, "Was this a factory load or one that he loaded?"
It seems when I read about these kaboom events the fault rests with the load, not with the barrel or any other component of the Glock. Right?
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I see very little to blame on Glock here, I wouldn't blame Glock if my G34 kaboomed, I would look into the variables first before addressing something as constant as the Glock product.
Jimmy it appears to be a factory squib load, followed by a nice second shot.
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I have read this whole thread and I have a couple of questions?
First I am new to Glocks. I have a 23 and a 35. I also have KKM's barrels for both. I have them in both 40 and 357 Sig.
If this is common problem in 40 cal's, should I just switch them over and leave them in 357 Sigs???
From what I'm reading it's not the firearm, it's the caliber that's the problem.
Thanks in adavance,
A stock glock barrel is reamed pretty large in the chamber area to make sure the rounds will feed no matter what,,
By doing this you leave a large part rear of the case unsupported so as you fire the pressure has to go somewhere and it expands the brass and you get glock belly or guppy belly the case looks like it is pregnant at the 6 o'clock position as it comes out of the barrel
this is mostly with 40-cal as it is running on the ragged edge pressure wise in factory form ..
a fully supported barrel like a KKM bar sto or firedragon efk will have full case head support so that the guppy belly should not be a problem but you sacrifice some reliability in the gun since it will no long feed out of spec ammo which is why the barrel was hogged out so bad in the first place..
Also see 38 super it had the same problem when people were trying to load nuclear rounds in it when they went to fully supported and ramped barrels the problem pretty much went away
Also set back plays a big part in Ka booms with the 40 a couple thousands of a inch is enough to drive the pressure way over Saami Limits and blow a barrel ..
If you carry a 40 and load or unload often consider the bullet in the chamber unsafe after 2 loadings maybe 3 I have seen set back in a 40 on the first loading ..
Different ammo makers have different rates of setback
Thanks for the info as I do have a G23, I have the .357sig barrel in it most of the time.
Technically, most chambers are not “fully supported”. Many "fully supported" chambers are just “more supported”. And as for Glock, their .40 barrels have more support than they did originally. I have a G23 I bought in the early 90’s, and I have a Glock .40 barrel that I bought a few years ago, and you can clearly see a difference. Personally, I have no worries about either one, because I only shoot quality commercial ammo in them.
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