Rechambering a round?

This is a discussion on Rechambering a round? within the Defensive Carry Guns forums, part of the Defensive Carry Discussions category; In another thread about rechambering at night, I note that it may be a bad idea to rechamber a round repeatedly. Can someone explain why? ...

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Thread: Rechambering a round?

  1. #1
    Member Array Phoebe's Avatar
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    Rechambering a round?

    In another thread about rechambering at night, I note that it may be a bad idea to rechamber a round repeatedly.

    Can someone explain why?

    With the price of SD ammo, I rechamber all the time.

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  3. #2
    Distinguished Member Array TerriLi's Avatar
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    It can lead to bullet seating, or pushing the bullet deeper into the case. This can lead to higher pressures I hear, and damage or worse.
    I know not what this "overkill" means.

    Honing the knives, Cleaning the longguns, Stocking up ammo.

  4. #3
    Member Array Phoebe's Avatar
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    Urgh! So, how many times is it safe to rechamber?

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    Ex Member Array Ram Rod's Avatar
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    Quote Originally Posted by Phoebe View Post
    Urgh! So, how many times is it safe to rechamber?
    That's a good question.......unless you have a set of calipers and keep records. The overpressure issue is more pronounced in the 40S&W. We are talking factory PD ammo here in general.

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    Distinguished Member Array Rugergirl's Avatar
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    Set-back is rarely a problem for me since the only time I remove my carry ammo is when I practice at the range, but I do check the carry ammo with a caliper periodically.
    Since I shoot my handguns in rotation it's only once every 5th trip to the range that I need to worry about set-back. Just one more reason I like my revolvers
    Disclaimer: The posts made by this member are only the members opinion, not a reflection on anyone else, nor the group, and should not be cause for anyone to get their undergarments wedged in an uncomfortable position.

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    Senior Member Array Keltyke's Avatar
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    Set-back is rarely a problem for me since the only time I remove my carry ammo is when I practice at the range,
    Same here. When I empty the magazine to shoot the range ammo (about once a week), I mix up the carry rounds so there's only a 1-in-13 chance of putting the same round back in the chamber. When I practice with my carry ammo, I shoot the "in use" magazine first, so the ammo gets changed out, usually about once a month.

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    VIP Member Array gottabkiddin's Avatar
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    Good advice by all..... I got nutin.
    "He that hath no sword, let him sell his garment, and buy one." Luke 22:36

    "If a law is unjust, a man is not only right to disobey it, he is obligated to do so." Thomas Jefferson

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    Senior Member Array jhh3rd's Avatar
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    Don't be cheap. Setback can ruin an expensive (inexpensive too) firearm, shooting hand, eyeballs, and a life. Who wants a tombstone that says, "he was good at saving a buck"?

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    Senior Member Array cz75luver's Avatar
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    If you're really concerned about bullet setback another thing you could do is just chamber with a range round (FMJ) and have the SD rounds in the mag(s). Just chamber the FMJ round once and if you eject it, use it at the next range session and load a fresh FMJ.

    Ever since I've heard about bullet setback, I've been logging the length of the round chambered for each of my pistols and have yet to see any setback. I have at least three re-chambering per and nothing so far. Since I had the caliper out, I actually ordered my rounds in the mags from longest to shortest with the absolute longest being the one chambered.

    The results were with either 9mm +P 124gr Gold Dots or .45 ACP +P 185gr Corbon DPX. The pistols were either CZ (9mm) or XD .45ACP.

  11. #10
    VIP Member Array varob's Avatar
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    If you know what you are doing, you can manually chamber a round then put a full magazine in. This cuts down on bullet setback.
    Don't believe what you hear and only half of what you see!
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  12. #11
    Senior Member Array chrise2004's Avatar
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    Quote Originally Posted by jhh3rd View Post
    Don't be cheap. Setback can ruin an expensive (inexpensive too) firearm, shooting hand, eyeballs, and a life. Who wants a tombstone that says, "he was good at saving a buck"?
    +1 well said.
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  13. #12
    Member Array lazy's Avatar
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    I'm a new CHL'r
    after seeing this thread i checked my ammo
    I been carrying my G27 for a month and a half.
    some nights I unload it . and some i just put in the night stand.
    so i would guess i have done this a few nights each week,
    I decided to ck my Bullets..
    this bullet was pretty beat up but to measure it . it was 1.122".
    I cked the next bullet and it was 1.124" I thought wow.
    so I cked all ammo in the Mag. some were 1.122" to 1.1245
    so some that have never been chambered were as short as the one that was chambered off and on for a month or more.
    but that bullet was beat up.
    so I think it's a good idea to rotate ammo.
    but as for impacting the lead.
    I would say it happens but how much for how long, would be hard for me to say .
    Fresh ammo for SD.
    These were Federal, Expandable Jacketed .40s

    Great info on this site....thanks
    Glocks

  14. #13
    VIP Member Array MitchellCT's Avatar
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    Quote Originally Posted by cz75luver View Post
    If you're really concerned about bullet setback another thing you could do is just chamber with a range round (FMJ) and have the SD rounds in the mag(s). Just chamber the FMJ round once and if you eject it, use it at the next range session and load a fresh FMJ.
    Yeah...

    The round in the chamber may be the only one you get off in the event you really need it. Guns fail to cycle due to the slide being grabbed, it being pressed into someone, clothing being in the way, limp wristing...ectra.

    You want to bet your life on a $1.25 per bullet DPX round...or a $.22 Federal American Eagle round?

    If you are so conserned, when you rechamber, go with a round lower in the mag.

  15. #14
    Member Array itsatoolbox's Avatar
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    In the last seven months of watching rounds be rechambered and extracted daily I have found the following:

    Of 364 rounds that were chambered and extracted daily for over a year (only about 20 of which were actually rotating through the chamber), I personally removed from service about 5 slightly setback rounds (noticeable to me, but minor) and about 5 catastrophically setback rounds (would have definitely destroyed the weapon if fired). These were likely due to individuals repeatedly rechambering already setback rounds.

    Since the last ammo replacement, I have observed the same circumstances with rounds in service for about four months, and I have seen no setback of rounds, yet. (Note: old rounds were 9mm +P+ Hi-shocks, new ones are 9mm +P+ Hydra-shocks; IMHO I have reasons for disliking both, EDIT: Note that the weapons in question are a mixture of Gen 2 and Gen 3 Glock 17s)

    Essentially, old rounds were chambered and extracted about 200 times each, without any inspection before I got to them, and they did eventually setback, some worse than others. All had substantial case wear (scratches and gouges), but extracted just fine. New rounds have been chambered and extracted about 40 times each with nothing but light case wear.

    On a personal weapon, I had Gold Dot 9mm +P 124grs that were chambered and extracted repeatedly over about 2 years (I was young, stupid, and poor), of about 60 total and 10 cycling rounds, I saw one VERY minor setback. This didn't occur until after I took the weapon out of EDC.

    In my experience, rounds can be recycled through the chamber repeatedly and still function safely. However, even the best will eventually setback, and you MUST inspect the rounds regularly. Ideally, all rounds available should be rotated through the chamber to minimize wear and the possibility of problems, and again REGULARLY INSPECT them.

    Sorry for the long post, hopefully this is useful!
    Last edited by itsatoolbox; October 20th, 2009 at 08:42 PM.

  16. #15
    Senior Member Array cz75luver's Avatar
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    Quote Originally Posted by MitchellCT View Post
    Yeah...

    The round in the chamber may be the only one you get off in the event you really need it. Guns fail to cycle due to the slide being grabbed, it being pressed into someone, clothing being in the way, limp wristing...ectra.

    You want to bet your life on a $1.25 per bullet DPX round...or a $.22 Federal American Eagle round?

    If you are so conserned, when you rechamber, go with a round lower in the mag.

    So, shot placement isn't what matters, it's the round you've used?.? Yeah . . .

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