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RIA 10MM Groove Diameter.

Discussion in '1911 Forums' started by steve4102, Dec 27, 2012.

  1. steve4102

    steve4102

    2,831
    1,296
    Jan 2, 2009
    The barrel on my New 10MM came with a **** ton of copper in the bore. It continues to copper foul very badly, so I slugged the bore.

    Bore slug measures .4035-.404. WOW, that's a some kind of a big. :shocked:

    Looks like a trip back to Armscor is in order.
     
  2. ilgunguygt

    ilgunguygt Enslaved in IL

    I would think that a call to Armscor would be in order. I am pretty sure they will make it right though. Everyone lets a bad one through, but I have always heard good things about Armscor. Especially about freebies when they come back.

    Be sure to let us know how this turns out. It will benefit us all.:wavey:
     

  3. 475-480

    475-480

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    Apr 2, 2012
    Houston,Tx
    So you can drop a .400"- HP bullet down your barrel and it will not get stuck? If it is that big a .400" jacketed bullet should drop right thru the barrel.



    Sean
     
    Last edited: Dec 28, 2012
  4. Jim Watson

    Jim Watson

    4,340
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    Jul 10, 2001
    Alabama
    Unless they are using very old tech to make barrels, they probably let a lot more than one bad one through.
    To generate a 10mm barrel with .404" groove with modern machines would call for somebody to grind a button, broach, or mandrel that much oversize. No telling how long it ran before somebody noticed it. If yet.
     
  5. B.Reid

    B.Reid

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    Montana
    Can't wait to hear what they say.
     
  6. steve4102

    steve4102

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    Jan 2, 2009
    No, "groove diameter".

    [​IMG]

    [​IMG]

    [​IMG]
     
  7. steve4102

    steve4102

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    Jan 2, 2009
    I called Armscor. They have no pistols or parts available. They offered me a refund now or I could wait until sometime in January when they get parts and pistols.

    I have my choice of a new barrel and guide rod or a new pistol.

    I can't imagine mine is the only 10MM out there with an oversized bore.
     
    Last edited: Dec 28, 2012
  8. 475-480

    475-480

    35
    0
    Apr 2, 2012
    Houston,Tx
    I will check mine with pin gages when I get home this evening.

    Thanks,
    Sean
     
  9. steve4102

    steve4102

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    Jan 2, 2009
    Thanks, I would appreciate that.
     
  10. 475-480

    475-480

    35
    0
    Apr 2, 2012
    Houston,Tx
    Thank the LORD , .400". I do have some copper buildup in the grooves though, accuracy is good with .401 cast bullets.

    Sean