~~DANGER~~Re-Chambering the same round continuously.
This is a discussion on ~~DANGER~~Re-Chambering the same round continuously. within the Defensive Ammunition & Ballistics forums, part of the Defensive Carry Discussions category; I know that most of us on here are familiar with the dangers of this with regard to bullet setback, but I for one had ...
March 5th, 2012 11:11 AM
~~DANGER~~Re-Chambering the same round continuously.
I know that most of us on here are familiar with the dangers of this with regard to bullet setback, but I for one had never thought about this scenario. Be careful, and rotate your chambered rounds! Otherwise, you may end up hearing the loudest sound in the world: a click when you need to hear bang....Safe shooting
> THE FOLLOWING TRAINING ADVISORY WAS FORWARDED FROM GWINETT COUNTY
POLICE DEPARTMENT – LAWRENCEVILLE, GA
> In September of this year a GCPD officer was involved in a situation
which quickly became a use of deadly force incident. When the officer
made the decision to use deadly force, the chambered round in his duty
pistol did not fire. Fortunately, the officer used good tactics,
remembered his training and cleared the malfunction, successfully
ending the encounter.
> The misfired round, which had a full firing pin strike, was collected
and was later sent to the manufacturer for analysis. Their analysis
showed the following: “…the cause of the misfire was determined to
be from the primer mix being knocked out of the primer when the round
was cycled through the firearm multiple times”. We also sent an
additional 2,000 rounds of the Winchester 9mm duty ammunition to the
manufacturer. All 2,000 rounds were successfully fired.
> In discussions with the officer, we discovered that since he has small
children at home, he unloads his duty weapon daily. His routine is to
eject the chambered round to store the weapon. Prior to returning to
duty he chambers the top round in his primary magazine, then takes the
previously ejected round and puts in back in the magazine. Those two
rounds were repeatedly cycled and had been since duty ammunition was
issued in February or March of 2011, resulting in as many as 100
chambering and extracting cycles. This caused an internal failure of
the primer, not discernible by external inspection.
> This advisory is to inform all sworn personnel that repeated cycling of
duty rounds is to be avoided. As a reminder, when loading the weapon,
load from the magazine and do not drop the round directly into the
chamber. If an officer’s only method of safe home storage is to
unload the weapon, the Firearms Training Unit suggests that you unload
an entire magazine and rotate those rounds. In addition, you should
also rotate through all 3 duty magazines, so that all 52 duty rounds
are cycled, not just a few rounds. A more practical method of home
storage is probably to use a trigger lock or a locked storage box.
> FURTHER GUIDANCE:
> The primer compound separation is a risk of repeatedly chambering the
same round. The more common issue is bullet setback, which increases
the chamber pressures often resulting in more negative effects.
> In addition to following the guidance provided above of constantly
rotating duty ammunition that is removed during the unloading/reloading
of the weapon, training ammunition utilized during firearm sustainment
and weapon manipulation drills, should also be discarded if it has been
inserted into the chamber more than twice. This practice lessens the
likelihood of a failure to fire or more catastrophic results.
“A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.” --George Washington
March 5th, 2012 01:56 PM
Interesting - thanks for posting it.
March 5th, 2012 02:04 PM
Not the first time I've read something like this. Makes me wonder if I should discard that rechambered ammo after several go arounds. Cheap life insurance. Interesting reading, thanks.
March 5th, 2012 02:10 PM
Never heard of that before, but I can certainly see how it happens.
I try to keep from re-chambering more than three or four times, then it gets shot up at the next range session. While I keep an eye out for bullet set-back, this is rather disconcerting because there is no way to visually inspect the cartridge for primer failure.
Thanks for posting!
"The gun is the great equalizer... For it is the gun, that allows the meek to repel the monsters; Whom are bigger, stronger and without conscience, prey on those who without one, would surely perish."
March 5th, 2012 02:10 PM
You can educate ignorance, you can't fix stupid
Retired DE Trooper, SA XD40 SC, S&W 2" Airweight
dukalmighty & Pure Kustom Black Ops Pro "Trooper" Holsters, DE CCDW and LEOSA Permits, Vietnam Vet 68-69 Pleiku
March 5th, 2012 02:50 PM
Thanks for posting. When I go shooting and have to remove the chambered round, or when I remove the chambered round for whatever reason I simply stick it in the back of the box so I know that those are rounds that have been chambered at least once. Once I get to the point where most of the rounds have been chambered once or twice it's time to use them up and buy some more.
"Brilliant. So now we got a huge guy theory, and a serial crusher theory. Top notch. What's your name?" - Paul Smecker
March 5th, 2012 03:26 PM
+1 Before I realized the possible consequences of re-chambering, I used to be guilty. I would wipe / oil my primary carry gun once per week. The two top rounds would be recycled through the chamber over and over. Standing them next to fresh (non re-chambered) rounds, it was obvious that they were quite a bit shorter. Never knew about the danger relating to the primer though, thanks!
March 5th, 2012 03:29 PM
If you carry Cond 3 you don't have this problem!
But seriously, good info. I just re did my magazines. (Shot them up and re-loaded them and marked the top two with a Sharpie as a reminder)
March 5th, 2012 05:46 PM
I had no Idea,but I only unload the 1911 whenever I'm shooting,or cleaning,sounds like I need to start using a sharpie to color cases that have been chambered until the entire mag is colored,then repeat by wiping them off on the second chambering,after that they get shot and new ammo is loaded up
"Outside of the killings, Washington has one of the lowest crime rates in the country,"
--Mayor Marion Barry, Washington , DC .
March 5th, 2012 06:03 PM
Thanks for the reminder! Very good information.
March 5th, 2012 07:12 PM
"The world is filled with violence. Because criminals carry guns, we decent law-abiding citizens should also have guns. Otherwise they will win and the decent people will lose."
-James Earl Jones
March 5th, 2012 09:01 PM
Any round that has been cycled more that 3 or 4 times is set aside for the range.
The last Blood Moon Tetrad for this millennium starts in April 2014 and ends in September 2015...according to NASA.
Certified Glock Armorer
NRA Life Member
March 5th, 2012 09:46 PM
I rarely unchamber a chambered round, & put it into the range bag for my next range trip if it gets rechambered 3 or 4 times as well.
Imagine 100's of rechamberings. Wow.
"Historical examination of the right to bear arms, from English antecedents to the drafting of the Second Amendment, bears proof that the right to bear arms has consistently been, and should still be, construed as an individual right." -- U.S. District Judge Sam Cummings, Re: U.S. vs Emerson (1999)
March 5th, 2012 10:29 PM
Thank you for the reminder. I also make it a point to rotate my rounds and mark the ones that have chambered a few times.
Stop whining and go do something that makes a difference!
If you think that I may be talking to you, then I am.
March 5th, 2012 10:31 PM
I read this article a little while back, thanks for the reminder.
"When that gun comes out of that holster; it's business time." -Chris Costa
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