~~DANGER~~Re-Chambering the same round continuously.

~~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 ...

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Thread: ~~DANGER~~Re-Chambering the same round continuously.

  1. #1
    Member Array Crowbait's Avatar
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    Jan 2012
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    Exclamation ~~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


    > 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.
    > 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

  2. #2
    Member Array chasbo00's Avatar
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    Jun 2009
    Northern Virginia
    Interesting - thanks for posting it.

  3. #3
    Member Array greencobra's Avatar
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    Feb 2012
    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.

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  5. #4
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    Array Bark'n's Avatar
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    West Central Missouri
    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!
    Semper Fi

    "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."

  6. #5
    VIP Member Array Hiram25's Avatar
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    Good reminder!
    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

  7. #6
    Distinguished Member Array IAm_Not_Lost's Avatar
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    Jul 2011
    Western AZ
    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.
    "60% of the time...it works every time..." -Brian Fantana

  8. #7
    Senior Member Array kb2wji's Avatar
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    Mar 2010
    +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!

  9. #8
    VIP Member Array suntzu's Avatar
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    Dec 2011
    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)

  10. #9
    VIP Member Array dukalmighty's Avatar
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    Feb 2008
    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 .

  11. #10
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    Thanks for the reminder! Very good information.

  12. #11
    Senior Member Array 1911_Kimber's Avatar
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    Feb 2012
    Good to know.. Thanks!
    "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

  13. #12
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    Array RETSUPT99's Avatar
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    Any round that has been cycled more that 3 or 4 times is set aside for the range.
    flintlock62 and glockstar like this.
    Proverbs 27:12 says: “The prudent see danger and take refuge, but the simple keep going and suffer for it.”

    Certified Glock Armorer
    NRA Life Member

  14. #13
    Distinguished Member Array ArkhmAsylm's Avatar
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    Mar 2011
    St. Paul, Minnesota
    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)

  15. #14
    VIP Member Array AZJD1968's Avatar
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    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.

  16. #15
    Member Array All_Business's Avatar
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    Oct 2011
    Philadelphia, Pennsylvania
    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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