Cooper 17 CCM to 17 WSM

Discussion in 'Gun Project Questions & Gunsmithing' started by 1raggedhole, Jan 13, 2020.

  1. 1raggedhole

    1raggedhole Silver $$ Contributor

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    The case size of the old 17CCM is ever so slightly smaller than the newer 17WSM. So theoretically it would be easy to rechamber to the 17WSM. And the case head of the 17WSM is only very slightly larger, so it should be possible to use the same bolt. If one could figure out a way to convert the centerfire Cooper model 38 bolt to rimfire, it would make a spectacular rifle. I asked our local gunsmith but he’s not interested in the project. Any smiths out there who have tackled something like this and would be interested in doing one?
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  2. matthias

    matthias Gold $$ Contributor

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    Centerfire to rimfire isn't an easy conversion. You would have to fill the current fp hole locate the new.one and sort the firing pin. Maybe convert the current pin to a striker, and then make a new floating pin that is help captive. Lots and lots of work. Unless I am missing something.
     
  3. Dusty Stevens

    Dusty Stevens COVFEFE- Thread Derail Crew Gold $$ Contributor

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    You also have to make the bolt a 2 piece to be able to install the offset firing pin
     
  4. Tommie

    Tommie Gold $$ Contributor

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    In the distance we hear the mournful moan of classic Cooper fans...
     
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  5. Dusty Stevens

    Dusty Stevens COVFEFE- Thread Derail Crew Gold $$ Contributor

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    Theyre just shrugging their shoulders saying “maybe he can make it shoot now?”
     
  6. Mark McMahon

    Mark McMahon Gold $$ Contributor

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    Is the effort worth the gain?
     
  7. 1raggedhole

    1raggedhole Silver $$ Contributor

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    I’m always amused by how a shooter can justify their own desires and still dismiss others as not justified.
    Would love to hear from anyone willing to tackle it.
     
  8. matthias

    matthias Gold $$ Contributor

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    I really think you are barking up the wrong tree. Dont get me wrong, I have done many projects that took to much time and money.

    The amount of work and redesign/rebuild of the bolt required would be tremendous. Looking at a real basic idea of what it would take to modify the bolt you are looking at 5-6 honest hours on machines at $75-100 an hour. Then a rechamber , and dont forget the risk involved that something goes wrong.

    All to find out the rifle doesn't shoot the way it is expected to. Along with rimfire ammunition variables that are no longer controlled by reloading the centerfire.

    Is it doable? Yes
    Will it be very expensive? Yes
    Will it meet your expectations? A soft maybe
    In my honest opinion should you do it ? No
    Are there talented gunsmiths that can make it happen ? Absolutely

    Best of luck and let us know how it turns out.
     
    Iowa Fox likes this.

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