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Visible copper build up in GP100 barrel

Discussion in 'Handgun Discussion' started by smurf hunter, Jul 22, 2010.

  1. smurf hunter

    smurf hunter Auburn, WA Active Member

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    I've got a 6" Ruger GP100. Last night I was doing some indoor dry fire practice and gave it a serious inspection. Using a high intensity flashlight I noticed copper colored deposits along the rifling edges inside the barrel.

    1) How do I clean this?

    2) Is it a problem?

    As info this is a newer gun, just bought last spring and only has a few hundred rounds through it.
     
  2. Gunner69

    Gunner69 Hillsboro Member

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    Nothing at all to be concerned with.. A good copper solvent like Montana X-Treme Copper Killer of Barnes CR-10 will take it out in a hurry. just be sure to follow the instructons as written. Use it outdoors or in a VERY well ventilated area. I got a selevtion of the Montana Solvents and Lubes for Christmas and am really impressed with how well they work.
     
  3. Cougfan2

    Cougfan2 Hillsboro, OR Well-Known Member

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    +1 Very common, particularly with higher velocity loads. As Gunner69 said, use a good copper solvent and follow the directions and it should clean right up.
     
  4. smurf hunter

    smurf hunter Auburn, WA Active Member

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    Good to know. I recently started handloading, and while I've only shot a few dozen hand loaded rounds, I thought maybe this was an indicator I'd seated/crimped/charged wrong.

    Chances are this was happening with the manufactured stuff, but I never noticed.

    Thanks.
     
  5. MountainBear

    MountainBear Sweet Home, OR Well-Known Member

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    Use the copper solvent and run patches and brushes through until the patches stop coming out green.
     
  6. motoman98

    motoman98 Gresham, OR Active Member

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    Re: Handloading, using the TMJ plated bullets, ala Raineer and others, will leave a nice amount of copper in your barrel
     
  7. smurf hunter

    smurf hunter Auburn, WA Active Member

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    I've been using Hornady and Winchester JHP for reloads so far. I'm curious to try cast bullets for bulk plinking purposes.
     
  8. Cougfan2

    Cougfan2 Hillsboro, OR Well-Known Member

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    If you are shooting cast, try to keep the velocities below 1K FPS and use good hard cast bullets. Cast bullets at higher velocities can lead quite badly especially cheap ones. I used to load Hornady 148 gr HBWC's in .38 spl, but stopped loading them because the bullets were just barely hard enough to function properly and would lead terribly even with low velocity loads. I got very adept at using a Lewis Lead Remover, but not because I wanted to.
     
  9. Tilos

    Tilos Idaho Active Member

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    Copper fouling and leading can be greatly reduced by lapping, and or polishing the barrel.

    There's many how to's on the net and it can be done with common tools most shooters already have.

    Once completed, the need for harsh cleaning chemicals is way less.

    Just sayin'
    Tilos