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Thread: switch barrel project with Pics

  1. #1
    Basic Member
    Join Date
    Nov 2013
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    46
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    switch barrel project with Pics


    Hey all,

    New to the board and really like the atmosphere so far. I figured I would show some pictures and give some description of the machining process. I'm no wizard with words, so feel free to ask any questions if I am un clear.

    First thing I did was strip the action bare and used a CMM to map out the measurements of hole locations, bore sizes and cylindricity. I was surprised at the failure to hold center line (as much as .010") but for a $190 rifle I wont complain. After I had all my dimensions I decided I wanted to put the forward stud back on true center and ream the area were the barrels will fit in the action. This was mostly to de-burr the inside from the factory machining. I milled the forward stud out and threaded it to 5/16-24 3B. This got me back on center and a little better hold than the factory threads.




    After the action I had to make the new stud with the alignment pin to hold the barrel in place and repeat head space. I dug around the shop and found a large shoulder bolt that already had the 1/4 hex key in it. Threw it in the lathe and machined it down to new thread size and length.


    Next I had to machine the barrel to accept the pin. I locked the barrel up in a collet block and probed it for center and offset for headspace. Machined a spot-face to get a flat surface as the pocket needs to fit the matting pin with as little slip as possible. When done I had a hole with .00025" of room for the pin to slip in.



    All I had left to do is reassemble the riffle and check headspace.


    I also like the way the stock turned out


    Thanks for reading and let me know what you think.

  2. #2
    thomae
    Guest
    All I can say is that I wish I had your machinist's knowledge and the tools you have at your disposal.
    Can I come over to your house to play?

    What kind of barrel swapping do you plan to do?

  3. #3
    Basic Member
    Join Date
    Nov 2013
    Age
    46
    Posts
    24
    22lr OEM and now I have 22WMR, Next will be a 17. I would like it to be HM2 but a cheap 17 in 14 twist is hard to come by. It will probably be a HMR first. I do most of my mods at work. Everything is programmed on CNC except chamber work. I like that the old fashioned way. If you ever make it out to the Olympic peninsula come on by. The cool thing is I have the tooling and programs so to do another would take less than an hour.

  4. #4
    shanejohnson2002
    Guest
    How did you stain the stock? The machine work is impressive too, but I really like the look of that stock!

  5. #5
    Basic Member
    Join Date
    Nov 2013
    Age
    46
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    24
    The stock was the Original birch laminate. I sanded the walnut color down and rubbed in three good coats of Minwax Ebony Stain.

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