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Thread: Barrel worn out?

  1. #21
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    Would some copper cleaner help?
    "Freedom is never more than one generation away from extinction. It has to be fought for and defended by each generation."
    Ronald Wilson Reagan

  2. #22
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    Quote Originally Posted by 2k12ss View Post
    Its not a bench rifle to begin with, just shoot it the way it is suppose to be shot.
    8 inches at 100 yards is unacceptable for any rifle outside of a musket.
    Pat
    Serving as a LEO since 1999.
    USPSA# A56876 A Class
    Firearms Instructor
    Armorer for AR15, 1911, Glocks and Remington 870 shotguns.

  3. #23
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    Quote Originally Posted by Alaskapopo View Post
    8 inches at 100 yards is unacceptable for any rifle outside of a musket.
    Pat
    This one gave me a chuckle...

    8" at 100 yards is really far past acceptable accuracy for myself. I wouldn't tell anyone else to live with it either.

  4. #24
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    MUOTE=hkusp;1643476]I've put about 6500 rounds through my AR in the last three years. Barrel is LMT chrome-lined 14.5", 1/7 twist. It used to shoot 2-3MOA groups @100 yds with 55grn ammo, now rounds are scattering all over the place in about a 8" circle. After cleaning the gun I benched & rested it on sandbags yesterday, and with match grade 69grn ammo got sub-MOA groups. I tried the 55grn again and got flyers all over the place again.

    So, is the barrel done & dusted or is there anything that can be done to make it work with lighter bullets? I've still got about 1K rounds of 55grn that I'd prefer to shoot rather than sell to get expensive match grade ammo.[/QUOTE]

    My LMT barrel lasted to about 13k rounds before it started keyholing past 200 yards. And thats with shooting 90% Russian bi metal jacketed ammo and plenty of mag dumps.

    Id contact LMT and have them take a peek.

  5. #25
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    Quote Originally Posted by Sierra276 View Post
    Sounds like your rifle has probably a normal amount of Throat Erosion( 6,500 rnd's) which would explain why the shorter,( 55gr projectiles ) are producing a larger spread, and the longer projectiles are still producing tighter groups... Less bullet jump to the Rifling of the barrel... At least in theory...
    You can probably continue too shoot the 55grainers, if you don't mind the accuracy, or step up to a longer projectile... 62-70grn and see how they perform...
    In my humble first post, I think this is a bingo.

  6. #26
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    Man.. I have a couple of barrels with way higher round counts and throats so bad you can look into the chamber and see erosion... and they still shoot Hornady 55 FMJs good.
    "You people have too much time on your hands." - scottryan

  7. #27
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    Quote Originally Posted by markm View Post
    Man.. I have a couple of barrels with way higher round counts and throats so bad you can look into the chamber and see erosion... and they still shoot Hornady 55 FMJs good.
    Thank you. I mearly meant to add some validity to what seemed a perfectly logical answer. If he actually has this barrel checked over by an excellent gun/barrel smith, then I will become the wiser. I understand that barrels produced along the same line on the same day will often show different accuracy potential and wear characteristics.

  8. #28
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    Yeah... each barrel is its own animal... and the longer bullet idea makes sense to me. I just haven't seen it first hand.
    "You people have too much time on your hands." - scottryan

  9. #29
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    Quote Originally Posted by Alaskapopo View Post
    8 inches at 100 yards is unacceptable for any rifle outside of a musket.
    Pat
    That would be unacceptable accuracy for me even out of my brown bess musket.

  10. #30
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    I'd recommend pulling the flash hider off and cleaning all the carbon out of ii and cleaning the barrels crown. I'd also clean the bore with JB bore paste and then WipeOut-PatchOut copper remover along with their WipeOut-PatchOut accelerator.
    Chief Armorer for Elite Shooting Sports in Manassas VA
    Chief Armorer for Corp Arms (FFL 07-08/SOT 02)

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