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Shell speed

Discussion in 'Uncategorized Threads' started by jd288, Sep 20, 2008.

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  1. jd288

    jd288 TS Member

    Joined:
    Jan 29, 1998
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    I bought a couple boxes of Winchester Super X 3-1/4 dram 1-1/8 oz. shot #8s. It doesn't list fps. on box. Anyone have a idea what the speed might be. Thanks
     
  2. ink ball

    ink ball Member

    Joined:
    Dec 1, 2007
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    According to my Lyman book, this should be 1255 fps.
     
  3. jd288

    jd288 TS Member

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    Jan 29, 1998
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    ok Thanks
     
  4. mkstephen

    mkstephen Active Member

    Joined:
    Mar 16, 2008
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    Location:
    Middletown, Indiana
    The rule of thumb for 12 gauge is;

    Each 1/4 dram = 50 fps - more is plus - less is minus

    Each 1/8 oz of shot = 50 fps - more is less - less is plus

    Given that a 3 dram load with 1 1/8 oz shot = 1200 fps - then

    3 1/4 drams = (1) 1/4 dram increase from the given load above so...

    1200 fps plus 50 = 1250 fps. While this is not exact it is appoximate.

    Example using 3 dram 1 1/8 oz as the starting load;

    "How fast is a 4 dram load with 1 1/2 shot?"

    4 drams = (4) 1/4 oz units increase = +200 fps

    1 1/2 oz shot = (3) 1/8 oz units in reduction = -150 fps

    So the answer is 1200 + 200 - 150 = 1250 fps.

    More powder increases - more shot reduces.

    Less powder decreases - less shot increases.

    Michael Stephenson
     
  5. jd288

    jd288 TS Member

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    Jan 29, 1998
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    MkStephen Thats very interesting. Thanks for the info.
     
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