Drawing of a 6.5x55 AI reamer

Discussion in 'Gunsmithing' started by 22to45, Mar 2, 2012.

  1. 22to45

    22to45 New Member

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    Gentlemen:
    I am hoping someone has a drawing they can post here.
    Thanks
     
  2. diriel

    diriel Well-Known Member

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    I do not have the drawing, but if you get in touch with Bob Jourdan he is the man who engineered the 6.5 swede AI. Heck of a nice guy, and he does real good work.



    Gary
     

  3. Bob the nailer

    Bob the nailer Well-Known Member

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    I'll need to scan the print then I'll post it.
     
  4. Bob the nailer

    Bob the nailer Well-Known Member

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    Here ya go.
     

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  5. 22to45

    22to45 New Member

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    Thank you Bob...
     
  6. Scot E

    Scot E Well-Known Member

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    What is the increase in capacity compared to the standard Swede?


    Scot E.
     
  7. Bob the nailer

    Bob the nailer Well-Known Member

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  8. Scot E

    Scot E Well-Known Member

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    This is the quote from the article you listed above regarding the swede.

    For the next best gain, number four in the chart provided, I am taking my writer’s prerogative to show a standard cartridge that Ackley did not work on, but is now known as the 6.5x55 BJ Ackley Improved, the initials being my own. In the early 1990s I thought the standard 6.5x55 Swedish cartridge would show nice gains if it were improved as an Ackley. Little did I know that Ackley never did it. But to make a long story short, I got busy and copied the Ackley design into the 6.5x55, with a great deal of input from Dave Manson of Manson Reamers (PS advertiser). With the 140 gr. bullet the velocity gain is 13.7%. Standard factory velocity is 2550 fps, while the 6.5x55 BJ Ackley gets 2900 fps. This is another Ackley cartridge that I have used extensively for hunting, and I have heard from several readers who use it in long range competitive shooting.

    Do you know any further info regarding this quote? Were the pressures kept the same for the AI load as the factory loadings? The swede is a bit of an anomaly because many of the factory and hand-load recipes are loaded to low pressures of around 45-47k psi so they can be used in the older Mauser style actions of the past. If the pressures were increased for the AI, which is possible as I am sure it was done on a new, stronger action, then those numbers likely aren't accurate.

    I think the listed velocity of 2550 is a bit low even for the lower pressured recipes. But if the pressures remained constant throughout the tests that is still a pretty impressive increase, especially when you keep in mind the other benefits of the AI chamberings like case life, less case work, etc.

    Scot E.
     
  9. Bob the nailer

    Bob the nailer Well-Known Member

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