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Thread: Shooting "Out" A Barrel While Shooting?

  1. #11
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    Quote Originally Posted by payj View Post
    Thats kind of what I'm trying to get at. Do you think a barrel would be ruined if you shot lets say 2k rounds in an hour or less full auto. Or would it take more than that?
    I'm saying that if you found yourself in a situation, where you needed to shoot 2K rounds in an hour, the last thing you'll be worried about is wearing out your barrel. I'm also guessing that you would have plenty of barrels lying on the ground to choose from, should you find yourself (luckily) worrying about your barrel.

  2. #12
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    If found this after a quick google. BTW, I used an M16A2 back in the day and the sustained rate of fire was 12 - 15 rds per minute.


    Tests conducted by both the Army and by Colt indicate that "exceeding the sustained rate of fire of 15 rounds per minute will result in the weapon 'cooking off' rounds after approximately 170 rounds have been fired." If the maximum rate of fire of 90 rounds per minute "is maintained for about 540 rounds, the barrel softens and gas starts to blow by the bullet, changing the sound and size of the muzzle blast." If the operator continues to fire the weapon, the barrel will begin to droop, and finally, at about 596 rounds, the barrel will burst.
    A bit off topic and trying to not be a smart ass but....... You can't miss fast enough to win. 1K rds in an hour (assuming you had someone loading your mags) is about 16 rds a minute.

  3. #13
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    Normal service life for a barrel is around 10,000 rounds. I switch my match barrels somewhere between 4,000 and 6,000 rounds when they stop shooting decent groups, but they are still safe to shoot. If you do a lot of mag dumps, I imagine wear will be accelerated.

  4. #14
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    Quote Originally Posted by 7 RING View Post
    Normal service life for a barrel is around 10,000 rounds. I switch my match barrels somewhere between 4,000 and 6,000 rounds when they stop shooting decent groups, but they are still safe to shoot. If you do a lot of mag dumps, I imagine wear will be accelerated.
    And this is a shooter trying to get 1" or less as a standard of performance.

    For my needs and typical usage and probably most of us here, hitting an 8" pie plate sized target (similar to a center mass hit requirement) each and every shot is all i ask 99% of the time. So a barrel might give me 30k easily with that standard.

    I only shoot off the bench to get a sight zero'd in, otherwise you'll rarely see me at a bench. It's training in real-life type distances and conditions, so a barrel will last me a LONG time.

  5. #15
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    Not in battle, during a day of SRT training. We had lots of M855 to burn off, and the LT told us to expend it all before we departed the range. This was a typical .mil rack grade M4, and got shot alot, so I'm not are about the condition of the barrel. I do know we shot alot that day.

    In reality, I'd keep the M4's on semi and use crew served if FA fire was called for.

    Quote Originally Posted by payj View Post
    When you did that, was it in a battle? I'm tring to figure if in a realistic situation if it would happen. I would be in semi auto though. Your saying 420 rounds back to back in three round burst may have been bad, but do you think it ruined you barrel? Or do you think if it cooled down it would be gtg?
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  6. #16
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    Great, all the info I was looking for has pretty much been answered. It seems like it would not be too likely to shoot "too much" in one time to ruin you barrel in a shtf situation. And if you are you will most likely be dead before that time anyway.....Thank you for the input.....

  7. #17
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    I'm sure most guys have seen this,,but these guys burnt out there BBL in a little over 800 rds,,,,,,
    http://www.youtube.com/watch?v=8CRXH-muly0

  8. #18
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    Call me a wuss, but if it's too hot to touch, it's too hot...especially with a gloved hand.

    Each time you heat a barrel, especially past the hottest it's ever been, the structure of the barrel changes.

    Sure, the change/damage may be slight but it's cumulative and unnecessary.

    Then again, I'm not into "mag dumps" as for me any way, they serve no perpose.
    Last edited by LONGBOWAH; 12-02-10 at 01:18.

  9. #19
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    Quote Originally Posted by LONGBOWAH View Post
    Call me a wuss, but if it's too hot to touch, it's too hot...especially with a gloved hand.

    Each time you heat a barrel, especially past the hottest it's ever been, the structure of the barrel changes.

    Sure, the change/damage may be slight but it's cumulative and unnecessary.

    Then again, I'm not into "mag dumps" as for me any way, they serve no perpose.
    If you shoot through a full magazine or two in an AR in a rapid shooting string it will burn you if you touch the barrel.

    I wish I was exaggerating. But that's been my experience.

    I think we shot three or four through my AR in the space of about 2 minutes, I wanted to get through all the magazines I had at the range, to test the followers, and we had a bunch of pistol/magazines, etc., so I shot them back to back, knowing the AR would heat up, but the gun range was going to close so I wanted to let the gun cool down as much as possible, but also test the magazines since I was there.

    It was hot hot hot, I let it sit out for 10-15 minutes, cased it up, drove about 15 minutes home, uncased it, the barrel was still too hot to the touch (ETA: let me correct that, it was hot enough that when I finished shooting I didn't even need to touch the barrel, I could feel the heat radiating off of it, when I got it home, I think I could touch it with the back of my hand but it was still uncomfortably hot, I remember being somewhat concerned I was going to catch the case on fire), set it out on the counter and let it cool, it was still slightly warm about 10-15 minutes later.

    But some blog did heat measurements, the Barrel and FSB after about 90-120 rounds will hit about 400 degrees, IIRC.

    https://www.m4carbine.net/showpost.p...&postcount=123

    I can't recall where I've read that data, but this is the best I could do, after 80 rounds the M4 Handguards reached 350 degrees.

    Which would support my statement of the barrel getting around/above those temperatures if it's radiating enough heat to get hand guards that hot. (Also considering we're talking 90-120 shots versus just 80).
    Last edited by BWT; 12-02-10 at 02:11.

  10. #20
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    Quote Originally Posted by Militant83 View Post
    But say it was a military issued rifle which is a hammer forged barrel.
    Not to be a dick, but Colt barrels are button rifled.

    ETA: Durr moment - FNH M16 barrels are CHF.
    Last edited by Magic_Salad0892; 12-02-10 at 02:25.
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