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Thread: What would cause this kind of compensator damage?

  1. #11
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    Several months back, I purchased a thousand pulled M855 projectiles for Re-loading... They were very clean, sized and had very few marks from the process... Everything about the bullets appeared to be A-Ok...

    If I hadn't paid attention during the re-loading process, I would never have known There was an empty Jacket in the mix...( no lead core or penetrator) Perhaps that is what happened with the reloads you purchased... They may have received pulled bullets from a scrapped Mil-Spec contract run that didn't meet the requirements... and was not explained what the failure was... hence selling out the very problem ( empty jacketed bullets), which in turn ended up in the cartridge's you shot...

  2. #12
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    I emailed JP about how to obtain a replacement compensator around dinner time, and I got a reply about 30 minutes ago!! It's Saturday night!

    Talk about awesome. I love these guys, makes me want to build another rifle just so I can use more of their parts.
    Last edited by netchemica; 05-04-13 at 23:25.

  3. #13
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    off track

    Did you notice any odd impacts on target, like sideways, keyhole and signs of rounds coming apart in flight?
    I'm not trouble shooting just asking.
    Last edited by blade_68; 05-04-13 at 22:46. Reason: reread post
    NRA Life Member.

  4. #14
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    Quote Originally Posted by blade_68 View Post
    Did you notice any odd impacts on target, like sideways, keyhole and signs of rounds coming apart in flight?
    I'm not trouble shooting just asking.
    I forgot to mention that in my original post. All of my bullet holes were normal... really spread out, but normal.

  5. #15
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    I dont think that was a jacket separation because the first opening doesn't have any strike marks on it. If the jacket was coming apart the first opening would have taken the most of the impact force. Besides piece of copper jacket has very little mas, I don't think it has enough energy to destroy the break like that.
    Or I'm wrong and what could have happened is that the jacket did come a part right out of the barrel, struck the first opening, upset the bullets path enough so that it struck the second opening?
    Or another scenario is that the bullet did not stabilize and started to yaw as soon as it got loose from the barrel.
    Either way it shows those strikes are from the bullet, there is no way in hell piece of copper jacket could have cracked that break.
    See maybe you can take the break off and shoot some paper targets. Look for a keyhole in them. Shoot some really close, like 5 yards or something. Then shoot a known good ammo and compare the bullet holes. They dont have to hit paper sideways to damage the break, if the bullet's pitch or yaw angle is off by couple degrees, it will strike the muzzle device.
    Last edited by Toxa; 05-05-13 at 00:18.

  6. #16
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    Yea, I'm thinking bullet strike. Either the ammo or the comp was off on machining

  7. #17
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    Quote Originally Posted by T-TAC View Post
    Yea, I'm thinking bullet strike. Either the ammo or the comp was off on machining
    The compensator was already checked. It is square to the barrel and the ports are lined up properly. This compensator has thousands of rounds through it, the damage would have shown up already if it was machined wrong.

  8. #18
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    Quote Originally Posted by Toxa View Post
    I dont think that was a jacket separation because the first opening doesn't have any strike marks on it. If the jacket was coming apart the first opening would have taken the most of the impact force. Besides piece of copper jacket has very little mas, I don't think it has enough energy to destroy the break like that.
    A blank round can kill a person at close enough range. P=mv, with 3,200fps, you don't need a lot of mass.
    Quote Originally Posted by Toxa View Post
    Or I'm wrong and what could have happened is that the jacket did come a part right out of the barrel, struck the first opening, upset the bullets path enough so that it struck the second opening?
    Very possible, but the first baffle has zero marks on it. Even if the jacket didn't have enough force to damage the baffle, it would have been evident on the erosion from the gun powder. The first baffle wasn't struck at all.

  9. #19
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    A blank round can kill a person at close enough range. P=mv, with 3,200fps, you don't need a lot of mass.

    Has killed at least one Hollywood actor. People don't realize that thr gas has mass as well! Roughly the weight of the powder plus a bit of O2.

  10. #20
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    Quote Originally Posted by netchemica View Post
    A blank round can kill a person at close enough range. P=mv, with 3,200fps, you don't need a lot of mass.

    Very possible, but the first baffle has zero marks on it. Even if the jacket didn't have enough force to damage the baffle, it would have been evident on the erosion from the gun powder. The first baffle wasn't struck at all.

    I reckon then it's bullet not being stable when leaving the barrel. They are so offset that they strike that break only an inch or so after leaving the barrel.
    I think that the reason you didnt see any funny holes on paper is maybe because bullets that struck your break didnt even made it there! I would really like to see you shoot some paper at close range with those loads.
    Either way it goes, sucks that you have to go through the ordeal!
    Last edited by Toxa; 05-05-13 at 09:36.

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