Posted: 10/18/2011 4:07:39 AM EDT
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Alright. Y'all have made me paranoid to an extent. Or at least GD has.
I've got a police trade in Glock 22. I fired it a while back but haven't fired it in a while. Is it safe to fire or should I expect it to kaboom on me? I don't reload my own ammo. I'll only fire factory ammo out of it. Is the partially supported chamber that much to worry about? Should I convert it to a 9mm or get rid of it and replace it with something else? |
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I bought my old, issued Gen 2 Glock 22. Who knows how many rounds it has through it. It was issued to at least two others before me. I have no fear in shooting it whatsoever. I, like you, stick to factory ammo in all .40SW guns. If you are that worried send it back to Glock for a re-fit/inspection.
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| the reason why glocks and any other pistol goes kaboom is because people load and unload the gun and chamber the same round over and over. That bullet in the round slowly makes it's way deeper into the casing and causes an over pressure condition when they shoot that round. |
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I thought it was the semi-supported or unsupported chambers. That is part of it , nothing to do with loading the same bullet over and over. Glock is one of the most popular and therefore the most reported on problems. Biggest problem is jerks reloading to make a bigger boom than the guy beside them at the range. Having reloaded 1000's of rounds for mine the only problem has been Winchester white box bullets splitting. Good pistol just treat it rite. |
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I thought it was the semi-supported or unsupported chambers. That is part of it , nothing to do with loading the same bullet over and over. Glock is one of the most popular and therefore the most reported on problems. Biggest problem is jerks reloading to make a bigger boom than the guy beside them at the range. Having reloaded 1000's of rounds for mine the only problem has been Winchester white box bullets splitting. Good pistol just treat it rite. That is a real world problem. There were a rash of LEO kabooms until they figured that out and put warnings out a few years ago. Cops loading and unloading their weapons and chambering the same round over and over. It is a documented problem and should be avoided. |
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the reason why glocks and any other pistol goes kaboom is because people load and unload the gun and chamber the same round over and over. That bullet in the round slowly makes it's way deeper into the casing and causes an over pressure condition when they shoot that round. This is one reason, from what I understand a leading cause of it. The .40 is fairly high pressure round anyway, it doesnt take much bullet setback to increase that pressure even more. Crappy reloads are another cause, as is shooting large amounts of lead bullets without cleaning. |
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I thought it was the semi-supported or unsupported chambers. That is part of it , nothing to do with loading the same bullet over and over. Glock is one of the most popular and therefore the most reported on problems. Biggest problem is jerks reloading to make a bigger boom than the guy beside them at the range. Having reloaded 1000's of rounds for mine the only problem has been Winchester white box bullets splitting. Good pistol just treat it rite. In that you are very much wrong. |
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In 18 years in LE, I've never seen a G22 KB. Some of my friends in proactive units put somewhere near 800+ rounds A WEEK through their G22's, over a number of years. Its pretty much fairies and unicorns when you talk about KB's with factory, jacketed loads and the G22. |
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I thought it was the semi-supported or unsupported chambers. That is part of it , nothing to do with loading the same bullet over and over. Glock is one of the most popular and therefore the most reported on problems. Biggest problem is jerks reloading to make a bigger boom than the guy beside them at the range. Having reloaded 1000's of rounds for mine the only problem has been Winchester white box bullets splitting. Good pistol just treat it rite. That is a real world problem. There were a rash of LEO kabooms until they figured that out and put warnings out a few years ago. Cops loading and unloading their weapons and chambering the same round over and over. It is a documented problem and should be avoided. Not in my real world. I carry a G22. I tested this with my ammo. There was zero measured difference in bullet setback. After 25 times re-chambered. It is far from fact. And a far cry to glock kb's. Glocks, or any gun do not cause kb's. Ammo causes it. The only fact is that in a glock .40 the chamber is less supported then many other .40 guns & when a KB happens again because of bad ammo, it tears the gun apart more violently. OP problems arise because of bad ammo, either reloaded wrong, or a bad factory load. It's rare with factory ammo & I would not worry about it. If you that concerned you can buy a newer glock factory barrel that has the updated chamber support. Here's a pic.. 
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I thought it was the semi-supported or unsupported chambers. That is part of it , nothing to do with loading the same bullet over and over. Glock is one of the most popular and therefore the most reported on problems. Biggest problem is jerks reloading to make a bigger boom than the guy beside them at the range. Having reloaded 1000's of rounds for mine the only problem has been Winchester white box bullets splitting. Good pistol just treat it rite. That is a real world problem. There were a rash of LEO kabooms until they figured that out and put warnings out a few years ago. Cops loading and unloading their weapons and chambering the same round over and over. It is a documented problem and should be avoided. Not in my real world. I carry a G22. I tested this with my ammo. There was zero measured difference in bullet setback. After 25 times re-chambered. It is far from fact. And a far cry to glock kb's. Glocks, or any gun do not cause kb's. Ammo causes it. The only fact is that in a glock .40 the chamber is less supported then many other .40 guns & when a KB happens again because of bad ammo, it tears the gun apart more violently. OP problems arise because of bad ammo, either reloaded wrong, or a bad factory load. It's rare with factory ammo & I would not worry about it. If you that concerned you can buy a newer glock factory barrel that has the updated chamber support. Here's a pic.. http://i879.photobucket.com/albums/ab352/fuzzytheman/Guns/casesu10.jpg Believe what you want. ETA: Don't take my word on it |
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the reason why glocks and any other pistol goes kaboom is because people load and unload the gun and chamber the same round over and over. That bullet in the round slowly makes it's way deeper into the casing and causes an over pressure condition when they shoot that round. I saw this phenom with my Springfield 1911 but with no KB and only with deep dish HPs, however isnt the real problem over charged reloads???? |
Seriously, unless someone shows me conrete unbiased data on glock KBs that is contrary of my next statement I believe its an over charged reloaded ammo issue. around and around we go shoot that .40 with factory ammo or ammo you reload yourself and know is spec and enjoy!!!!!!
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It's safe to fire as long as you shoot factory new ammo that meets SAAMI specs. Hot reloads combined with weak reloaded cases are the primary cause of KB's in Glocks.
Most of the .40 Glock KB "myth" if you want to call it that came from early Federal .40 ammo. The case wall was thinner back then and when combined with the unsupported feed ramp area which is most pronounced in Glocks but present in plenty of other pistols, the case wall would blow out. Federal quickly realized the problem and thickened the case wall of their .40 ammo and it hasn't been a problem since. |
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a properly assembled reload even with lead cast bullets is not an issue. no auto pistol barrel is fully supported. My brother who is an le glock armorer tells his guys to only chamber a round once then rotate it out- bullet set back in 40's is a real issue- pressures from bullet set back can quadruple causing a kb. if you shoot lead, just make sure to swab bore every couple hundred rounds or so and you'll be fine.
Almost all kb's come from either bullet setback,excess lead in bore or bad reloads,or rarely a bad factory round. under normal circumstances the gun is completely safe. if wouldn't be in the holsters of tens of thousands of le agencies if it wasn't a solid gun. after market barrels in my experience (master class gssf shooter with well over 100k thru glocks) are a waste of time- the only thing I have personally witnessed them do is dcrease reliability. another issue is people that think they can clean the leaded bore by shooting a jacketed bullet to push the fouling out- this increases bore resistance and pressure and can cause a kb. if you shoot lead,make sure to clean it prior to shooting jacketed. |
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Quoted: bullet set back in 40's is a real issue In my own testing it has just not been. Don't know why. I still rotate rounds every 5 chambers though. Not saying it not a potential problem, but it's not something I'm going to be very concerned about. Back in the mid 90s, This became a "Hot Topic/Discussion". The department Rangemaster actually put out a directive at our Bi-Annual Qualification, that we were not to keep chambering the same round. Reason: Setback. And this was with department issued Gen 3 S&W 9mm pistols. A couple years later, I moved to another department, and heard the same thing. (Glock 22s). Of course as someone else mentioned, There was an issue with EARLY Federal .40 ammo. (I do not believe there was ever a recall, but the lot numbers were known to stay away from). I saw the results of a KB, from a friends gun. It was not a Glock. It was a High Dollar 1911 (Forget which Brand). Cause of the KB? His reloads. He said that while at the range, he was shooting some of his reloads, and when pulled the trigger felt like a "light recoil", and when he shot the next round. KABOOM!. As for setback, I remember always being told that it was common with shotgun rounds. Now days, I just stick with factory ammo (Win, Federal, or Rem.) (maybe one day i will get back to reloads) |
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bullet set back in 40's is a real issue
In my own testing it has just not been. Don't know why. I still rotate rounds every 5 chambers though. Not saying it not a potential problem, but it's not something I'm going to be very concerned about. are you using hollow points. I think it's more common with hollow points and the warning I linked to mentioned 45 times chambering he same round. |
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I work for a large metro agency.
The Glock G22 has been the issued sidearm since about 2002. This is the only authorized sidearm. During basic firearms instruction, a trainee will fire ~2500 rounds in training. Officers assigned to the tactical unit will fire close to that in one month, depending on the training cycle. You can do the math for how many rounds they fire in a year. Never heard of a kB in my agency. Just stick to factory ammo. |
Get rid of that 40 cal Glock. It's going to blow up 
Bullet setback....yeah that's it. Buy a stinkin' micrometer and measure the OAL of the cartridge if you're worried about chambering the same round more than once  .
Oh, and watch out for that "snappy" recoil of that 40 cal, it causes bullet setback of the rounds in the magazine. 
NAD |
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bullet set back in 40's is a real issue
In my own testing it has just not been. Don't know why. I still rotate rounds every 5 chambers though. Not saying it not a potential problem, but it's not something I'm going to be very concerned about. are you using hollow points. I think it's more common with hollow points and the warning I linked to mentioned 45 times chambering he same round. Yeah HP's, Winchester & Gold Dots. I used in 9mm .40 & .45 |
| I have a 1993 or so G23 that never kB'd. It's been a few years since I shot it because I switched from the G23 as my EDC to a Sig P228. I shot handloads in it with no problems. As a matter of fact it was handloads that I shot in it most of the time until I switched to shooting Blazer aluminum cased ammo back when it was cheaper to shoot than my reloads. |