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Thread: Barrel shank size

  1. #1
    Boolit Buddy
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    Barrel shank size

    A simple question ... is 7/8 a large enough shank for a .223 barrel
    Or should I go to 1inch

  2. #2
    Boolit Master Artful's Avatar
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    Are you building your own action?
    Or trying to stub with an existing barrel.
    je suis charlie

    It is better to live one day as a LION than a dozen days as a Sheep.

    Thomas Jefferson Quotations:
    "The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government."

  3. #3
    Boolit Buddy
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    My own action
    7/8 allows me to buy a 1 inch blank barrel and be able to work with it in my lathe .

    For a 1 inch shank I'd be stuck with an 1-1/4 inch barrel blank that wont fit threw my head stock and I'd have to cut it shorter then I want to work on it

  4. #4
    Boolit Master pietro's Avatar
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    Quote Originally Posted by redneck1 View Post
    A simple question ... is 7/8 a large enough shank for a .223 barrel
    Or should I go to 1inch

    AFAIK, the nominal barrel shank size would be 1.05", so a 1" barrel shank should suffice.

    If your action won't accept a barrel with a 1" shank, IMO your best bet would to propose your question to a barrel maker (Douglas, Liija, etc, etc).


    .
    Experience is a wonderful thing - It lets you recognize a mistake, when you make it again.

  5. #5
    Boolit Master
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    A 1 inch blank could be threaded 1x14-16 and used with a nut similar to what Savage uses and that would be stronger than the 1/16" shoulder that would be left if threaded 7/8.

    The aesthetics might not suit your taste.

  6. #6
    Boolit Master
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    I'm of the opinion that a 7/8" shank is big enough for a 223. Look at a Turkish Mauser for example
    Some people live and learn but I mostly just live

  7. #7
    Boolit Master
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    Check the thread size of the small Sako action. I think it is 22 mm or .866 diameter


    Quote Originally Posted by redneck1 View Post
    A simple question ... is 7/8 a large enough shank for a .223 barrel
    Or should I go to 1inch
    EDG

  8. #8
    Boolit Buddy
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    I think small ring mausers are around .980 dia ... I could be wrong though .

    But I did some more searching and found quite a few actions that use 7/8 dia or smaller for the barrel shank .

    For example the Mossberg mvp in .223 uses a a 7/8 shank .

    I feel fairly confident that this is a safe compromise to make and be able to work within the size limitation of my 10x22 lathe .

  9. #9
    Boolit Master

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    Thompson contender barrels are 0.810" I believe, and come in .223.

  10. #10
    Boolit Master
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    I'd try and read through this.
    http://www.cip-bobp.org/sites/defaul...e/A-4-1_EN.pdf
    Page 3 defines the category of the steel as I understand it.
    Compare your barrel steel to steel composition noted there.
    Page 6 for a starting point. (223)
    Cat 2 looks like softer steel ??
    1mm=.03937" 5mm wall = .19685 Base 223=9.61mm=.3783
    .19685+.3783+.19685 = .771" dia.
    As sanity check, evaluate 22 liner barrels against the chart. (.3125 Dia - .224)/2 =.0885 =2.24mm wall thickness
    Chart dictates 1.2mm so 2.24 safety factor of almost 2.(1.866666.....)
    Disclaimer: I did not stay in a Holiday Inn last night!

  11. #11
    Boolit Buddy
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    As luck would have it I got an answer back from the barrel manufacturer after almost a three week wait .

    7/8 is well within the safety margin

  12. #12
    Boolit Master
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    Marlin uses barrel shanks about .100 smaller on a M 1895 in 45-70 so for a 223 your fine.

    Jedman

  13. #13
    Boolit Master
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    Cooper uses a 3/4" shank on at least one of their rifles in .223. I have a factory take off I'm going to adapt to something else. Looks like plenty of meat around the chamber to me.

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