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Thread: What would cause this kind of compensator damage?

  1. #31
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    Quote Originally Posted by markm View Post
    No. The bullet was likely still somewhat intact and hadn't come apart yet. It made it through the first chamber before getting squirrelly.
    No. I have a hard time believing that the piece of jacket alone cracked that break. Those are clear bullet strikes.

    ETA, I put forward three theories and you singled out just that one. I just dont get it how can you be so sure of your self when there are clearly multiple forces at play here that can produce that kind of effect.
    Last edited by Toxa; 05-06-13 at 15:01.

  2. #32
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    Quote Originally Posted by IndianaBoy View Post
    It takes a little bit of time for a bullet to come apart. It was likely still within the tolerances to fit through the first baffle, but had expanded enough to strike the second.

    There is tremendous centripetal force on a bullet. I've blown up 40 grain bullets with my 220 Swift by pushing them too fast before I figured out that heavy for caliber bullets are generally better for most applications. And that's with a 1-12 twist well north of 4000 fps.

    1-7, 1-8 or 1-9 @ 3100ish fps is a lot of rotation.
    I have a hard time with this theory. I ,like you, have blown up a few 52 gr bullets as well. Every single one of them would explode at about 25 yards from the barrel and a clear puff of gray smoke could be visible. In 1-7 twist bullet fired at 3200fps spins at ~310,000 RPM, so yeah that's a lot of spinning.
    We just gona have to wait and see those paper targets, if OP ever gets around to it. We should be able to see of it's a jacket separation or tumbling issue.

  3. #33
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    Quote Originally Posted by Toxa View Post
    We just gona have to wait and see those paper targets, if OP ever gets around to it. We should be able to see of it's a jacket separation or tumbling issue.
    My guess is that the paper will show nothing, and that it was an isolated bullet. On the other hand... if he's getting 18 inch groups at a hundred??

    Good Grief... Helen Keller can do better than that.
    "You people have too much time on your hands." - scottryan

  4. #34
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    Quote Originally Posted by markm View Post
    My guess is that the paper will show nothing, and that it was an isolated bullet. On the other hand... if he's getting 18 inch groups at a hundred??

    Good Grief... Helen Keller can do better than that.
    I think that the muzzle brake may have started throwing rounds after it was damaged. I've never shot at any serious distance, 99% of it was at 25 yards. I'm usually pretty good with a handgun (I know, different animal). I'm currently the only person at our unit that can qualify with a perfect score consistently. I figured some of that trigger discipline would have transferred over. The stock of the rifle was squared on my shoulder, breathing was calm, and I was using a quality optic (Leupold Mark IV 4.5-14x40).

  5. #35
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    Have you tried pulling the brake and seeing what the bare muzzle does?
    Jack Leuba
    Director, Military and Government Sales
    Knight's Armament Company
    jleuba@knightarmco.com

  6. #36
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    Dude, stop chewing on your comp.
    Ken Bloxton
    Skill > Gear

  7. #37
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    Quote Originally Posted by netchemica View Post
    I think that the muzzle brake may have started throwing rounds after it was damaged. I've never shot at any serious distance, 99% of it was at 25 yards. I'm usually pretty good with a handgun (I know, different animal). I'm currently the only person at our unit that can qualify with a perfect score consistently. I figured some of that trigger discipline would have transferred over. The stock of the rifle was squared on my shoulder, breathing was calm, and I was using a quality optic (Leupold Mark IV 4.5-14x40).
    Yeah.. I wasn't saying YOU couldn't shoot... I'm saying there's a problem beyond my original notion of just one bad bullet if they're shooting that bad.
    "You people have too much time on your hands." - scottryan

  8. #38
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    Pull the brake check the crown for any burrs and then shoot again at 100. I betting on jacket separation but it could also be a burr destablizing the bullet causing a strike. To me it looks like it is mostly errosion with only one light strike.

  9. #39
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    I took the compensator off to get it read to ship it back to JP. The damn thing is 6.15oz, lol. The factory A2 off my BCM rifle is only 2.05, literally a third of the weight.
    Last edited by netchemica; 05-06-13 at 17:10.

  10. #40
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    A laser bore sight might not be an accurate test as it's not .223 wide so you don't see a light path the diameter of the bullet. Try running a 556 bore straightness guide down from the muzzle and see if there is interference or non concentric clearance with the comp. Then there's the barrel and comp interface and how true/square they are.
    Last edited by webscrounger; 05-07-13 at 02:18.

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