Muzzle Brake Bullet Clearance

Discussion in 'Gunsmithing' started by Tikkamike, May 20, 2010.

  1. Tikkamike

    Tikkamike Well-Known Member

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    What are you guys running for bullet clearance on your 338 Lapuas and other big 338's I am thinking of a Muscle Brake with .020 clearance. any info would be good.
     
  2. GNERGY

    GNERGY Guest

    The Muscle brake on my 338 Ultra mag has a .358 ID
    Tarey
     

  3. Tikkamike

    Tikkamike Well-Known Member

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    Tarey do you have a pic of your rum?
     
  4. J E Custom

    J E Custom Well-Known Member

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    If properly installed .020 thou is enough (.010 each side) .

    Some people like .025 to .040 clearance to make sure that the bullet does not touch
    the break when fired.

    I like .020 and think that the break works better when tolerance is close.

    J E CUSTOM
     
  5. Rustystud

    Rustystud Well-Known Member

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    Testing has shown .020" clearance is about optimal. Tighter causes accuracy problems. Looser does not reduce recoil.
    Nat Lambeth