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Comb movement necessary to change POI?

Discussion in 'Shooting Related Threads' started by Rollin Oswald, May 14, 2012.

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  1. Rollin Oswald

    Rollin Oswald Active Member

    Joined:
    Jan 29, 1998
    Messages:
    1,313
    Location:
    Brillion, WI
    Shooters sometimes want to know how moving the comb on their gun will affect the gun’s point of impact (POI). POI is where the center of the pattern will be at a particular distance.

    Although "Stock Fitter’s Bible [Second Edition]" has a drawing and a formula on page 180 explaining how comb movement changes a gun’s POI, the reader must do the math.

    Now there’s an easier way. A shooter in Denmark created an automatic POI calculator. Plug in the distance and the calculator automatically comes up with the comb movement necessary for a chosen POI change.

    The drawing, the formula and the calculator were put on one page. If you would like it, email me (above). Put “POI calculator” in the subject line. I will reply with the 8 ½ x 11-inch attachment.

    The drawing and calculator are copyrighted but you are free to use them and email them to anyone else who wants them. However, neither the drawing nor the calculator can be used in any written or electronic publication without my written permission.

    Rollin
     
  2. Ron Burdick

    Ron Burdick Active Member

    Joined:
    Jan 29, 1998
    Messages:
    770
    Location:
    Duncan, SC
    Rollin,

    It is good to see you back on TS.com.

    I always look forward to what you contribute to this site.

    Ron Burdick
     
  3. Rollin Oswald

    Rollin Oswald Active Member

    Joined:
    Jan 29, 1998
    Messages:
    1,313
    Location:
    Brillion, WI
    Thanks, Ron;

    Trapshooters.com has more knowledgeable visitors, who are able to answer the majority of questions about stock fitting and shooting form.

    http://www.shotgunworld.com visitors have more questions that require answers that I can provide. It also has many fewer political pundits and crazies, which I like.

    Rollin
     
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