6mm bore

Discussion in 'Gear Talk: What to Buy? and Gear Evaluations' started by Acsr, Feb 4, 2018.

  1. Acsr

    Acsr

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    Wanting opinions. Is a .236 or a .237 Bore better for 6mm bench rest shooting?
     
  2. Sniper338

    Sniper338

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    post what caliber and bullet you want to run.. people gonna ask..
     
  3. Acsr

    Acsr

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    6br 107 gr bullets
     
  4. swd

    swd Gold $$ Contributor

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    Pick one it's not a deal breaker. Most fast twist barrels are 237 unless you buy a Brux which only come in 236.
     
  5. mr.big

    mr.big

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    my smith still tells me to get the .236
     
  6. JBT

    JBT Gold $$ Contributor

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    You would probably never notice the difference. When in doubt, go with gunsmith’s recommendation.
     
    Zero333 likes this.
  7. Sniper338

    Sniper338

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    +1. Ive never been able to tell the difference.

    Ive heard a good sounding theory or explaination, but I cant put it into words like someone else may be able to. Im not knowledgable enough on it.

    Something about the tighter bore will crate more pressure faster so shorter bullets slower twist rate, opposite for 237...

    also heard its a difference in the rifling hight inside the bore, .237 cuts into and grips the bullet a thousanth more than the .236, thurs creating a pressure difference to push the bullet out...

    DONT quote me on this by any means!!!...
     
    Last edited: Feb 5, 2018
  8. tclaunch

    tclaunch Silver $$ Contributor

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    also heard its a difference in the rifling hight inside the bore, .237 cuts into and grips the bullet a thousanth more than the .236, thurs creating apressure difference to push the bullet out...

    The .236" has taller lands by 1/2 thousands, It is the default bore size that Krieger offers for their long range 6mm barrels. Anything listed faster than 10 twist is .236" Brux as mentioned only offers .236". I have owned .237" and have had excellent results, just like longer life, and barrels less picky to lot to lot variations in bullet diameters.
     
    boiler_house7 and Sniper338 like this.
  9. JEFFPPC

    JEFFPPC

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    I have used both in both short and long range competition I prefer .237.
     
  10. butchlambert

    butchlambert Site $$ Sponsor

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    Have you pinned them to check the actual size, I doubt it. A good barrel is a good barrel. How thick is a human brown hair-.003to.004. .0005 looks small doesn't it?
     
    LA50SHOOTER, JRS and tmwinds like this.

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