6mm Muzzle Brake

Discussion in 'Gunsmithing' started by Iron Worker, Jun 27, 2018.

  1. Iron Worker

    Iron Worker Well-Known Member

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    I have a Vias Muzzle brake that I had a heavy bbl 6mm. The bore on the brake measures .250 . Can I use this on same diameter heavy bbl but .224 instead of 6mm ?
     
  2. J E Custom

    J E Custom Well-Known Member

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    The bore diameter in the muzzle brake for a 6mm should be ..264

    .250 is two tight. the bore diameter is only .014 thousandths larger than the bullet. Any error in alignment could easily cause bullet strike, ruining accuracy.

    It is best to bore the brake on a lathe, but if you already have a .250 bore in the brake you can drill it out if you are careful to get it aligned.
    If you decide to drill it, I would recommend a .270 bore for clearance error of the drill bit walking off center.

    .020 Is the recommended clearance but .025 will be safer and nor take away from the brakes efficiency.

    If you have a smith install it, have him bore it on his lathe to the proper diameter.

    J E CUSTOM
     
  3. Iron Worker

    Iron Worker Well-Known Member

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    J E custom thanks for response. My question was can I use this break(Formerly on a 6mm bored rifle) on .224 bore
     
  4. lancetkenyon

    lancetkenyon Well-Known Member

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    Yes.
     
  5. EddieHarren

    EddieHarren Well-Known Member

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    Various Brake manufacturers have varying specs for the bore size of their brakes. Little Bastard Gen II FB brakes call for .030" over bore size.
     
  6. J E Custom

    J E Custom Well-Known Member

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    Yes.
    If you put it on a .224 you should have .027 thousandths clearance (.007 more than the recommended minimum of .020)

    J E CUSTOM