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Thread: copper fouling on lands

  1. #1
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    copper fouling on lands

    I've got a factory barrel that copper fouls very badly but just on the lands for the last 2-3". The grooves have no copper what so ever. I tried iosso on a patch after I had the copper cleaned out but it didn't seem to make a difference. the barrel feels a bit tighter at the muzzle running a patch through. Any solution to improve it?

  2. #2
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    muzzles should be tighter
    try chemicals, but I have seen it before and sometime it just stayed.
    (not in a br bbl)

  3. #3
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    I'm thinking it might be a good candidate to try lapping the bore a bit with a lead lap. I've never tried lapping yet, but what the heck.....it's just a barrel.

  4. #4
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    Quote Originally Posted by Rflshootr View Post
    I'm thinking it might be a good candidate to try lapping the bore a bit with a lead lap. I've never tried lapping yet, but what the heck.....it's just a barrel.
    To be specific, itís just a Factory Barrel.

    Try some of Tubbs Fire Lapping rounds. They wonít hurt the barrel, and just might help it.

  5. #5
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    Quote Originally Posted by Rflshootr View Post
    I've got a factory barrel that copper fouls very badly but just on the lands for the last 2-3". The grooves have no copper what so ever. I tried iosso on a patch after I had the copper cleaned out but it didn't seem to make a difference. the barrel feels a bit tighter at the muzzle running a patch through. Any solution to improve it?

    Lap it, scrub it, do whatever you want to it but it helps to know WHY it's coppering at the muzzle and it ain't from a "tight bore"

    The reason rifles copper at the muzzle is because one of several things, probably machining defects, is causing copper to be liquified ("vaporized," "gasified") back at the chamber end, flown down the barrel and re-deposited at the muzzle.

    Generally speaking, the deposit you can visually see at the muzzle closely approximates the deposition in the first inch or two from the throat....

    Generally speaking, coppering in a Match barrel is the result of imperfections (tears, edges, smears) back at the leade left by the throating reamer....

    Generally speaking, coppering in a factory barrel is the result of.... well, have mama drag yerass down the paved road behind the pickup truck...deposition...

    Generally speaking, IMO you're chasing your tail if it's a factory barrel, just wipe the copper out chemically (Witch's Brew, ME Copper Killer etc) and friggin' 'CHOOT IT!

  6. #6
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    Quote Originally Posted by alinwa View Post
    Lap it, scrub it, do whatever you want to it but it helps to know WHY it's coppering at the muzzle and it ain't from a "tight bore"

    The reason rifles copper at the muzzle is because one of several things, probably machining defects, is causing copper to be liquified ("vaporized," "gasified") back at the chamber end, flown down the barrel and re-deposited at the muzzle.

    Generally speaking, the deposit you can visually see at the muzzle closely approximates the deposition in the first inch or two from the throat....

    Generally speaking, coppering in a Match barrel is the result of imperfections (tears, edges, smears) back at the leade left by the throating reamer....

    Generally speaking, coppering in a factory barrel is the result of.... well, have mama drag yerass down the paved road behind the pickup truck...deposition...

    Generally speaking, IMO you're chasing your tail if it's a factory barrel, just wipe the copper out chemically (Witch's Brew, ME Copper Killer etc) and friggin' 'CHOOT IT!
    Sweets 7.62 Solvent
    Do NOT leave it in for longer than recommended.

    It is potent stuff.
    I would try and actual lead lap and very fine compound.
    Maybe just rouge initially.

    Cast the lap in the barrel.

  7. #7
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    Quote Originally Posted by brickeyee View Post
    Sweets 7.62 Solvent
    Do NOT leave it in for longer than recommended.

    It is potent stuff.
    I would try and actual lead lap and very fine compound.
    Maybe just rouge initially.

    Cast the lap in the barrel.
    Sweets may be potent? I purposely submerged a barrel stub in a container of Sweets for 15 years and it did absolutely nothing to it. I finally threw it out. As to what to do about a "factory" barrel, try Jackie's suggestion.

  8. #8
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    Quote Originally Posted by Butch Lambert View Post
    Sweets may be potent? I purposely submerged a barrel stub in a container of Sweets for 15 years and it did absolutely nothing to it. I finally threw it out. As to what to do about a "factory" barrel, try Jackie's suggestion.
    The ammonia evaporate out rather rapidly.

  9. #9
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    Quote Originally Posted by brickeyee View Post
    The ammonia evaporate out rather rapidly.
    If it does, why did you post as you did? I guess mine evaporated from a sealed glass jar with sealed Mason Jar lid.

  10. #10
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    butch
    try again
    this time, in and out of sweets, as let some oxygen in to react.
    not surprised nothing happened submerged. look at the titanic salt water, almost no oxygen/lo temp.

    Quote Originally Posted by Butch Lambert View Post
    If it does, why did you post as you did? I guess mine evaporated from a sealed glass jar with sealed Mason Jar lid.

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