B-78 chambering help

Discussion in 'Gunsmithing' started by elkaholic, Nov 4, 2009.

  1. elkaholic

    elkaholic Well-Known Member

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    I have a B-78 that I want to re-chamber and a machinist in the area said he could do it WITHOUT removing the barrel. Is this possible and if so is it SMART? This guy is not a gunsmith, but some of the local guys say he does great work. (I'm skeptical?)......Rich
     
  2. Hairtrigger

    Hairtrigger Well-Known Member

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    Sounds like a rifle wrecker to me.
    Not a place to save a few dollars.
    If you want the rifle rechambered have a gunsmith di it correctly
     

  3. EddieHarren

    EddieHarren Well-Known Member

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    I believe that it may be possible. It would depend a whole lot on what chamber is in the barrel now and, what chamber you want to go to. I know a guy who took his 45-70 Sharps to 45-90 by hand.
     
  4. elkaholic

    elkaholic Well-Known Member

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    It's an '06 now and I'm going to an improved version so I don't think that would be the a problem......Rich
     
  5. Hairtrigger

    Hairtrigger Well-Known Member

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    I have read that to correctly rechamber to Ackley you need to set the barrel back one thread.
     
  6. elkaholic

    elkaholic Well-Known Member

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    It's not an Ackley but a 6.5 Sherman. It's based on a .270 case and has a 40 degree shoulder like the Ackley but the case has less taper and the shoulder is farther forward. Total length is 2.525 as opposed to 2.494.
     
  7. elkaholic

    elkaholic Well-Known Member

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    OOPS! I just realized that I said 6.5 and I meant 300 Sherman.......