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    Re: Sextant accuracy (was : Plumb-line horizon vs. geocentric horizon)
    From: Jared Sherman
    Date: 2005 Feb 13, 15:31 -0500

    Frank-
    
      Yes and no. These are examples, not
    meant as Talmudic pilpul. A "steady hand" will give you a grouping of two
    inches. The mechanical differences in each cartridge will cause changes, as
    will the heating of the rifle barrel. Can I suffice to say it becomes an
    exercise in the esoterics of rocket science and metallurgy and machining
    equal to that of a fine watchmaker without going further off-topic? (And
    feel free to email me off-list about that if you'd like, competition
    shooting  like celestial nav, either intrigues or bores.)
    
     From a bench rest, with the rifle clamped and fixed in position, with
    competition match-grade ammunition and rifle, a 1/2" group at 100 yards
    would still be considered competition grade shooting. Centering on the
    target is something else again, group sizes are measured across the
    group--not to the center of the target. The group is often not in the center
    of the target, that's something esle again. Good vision certainly helps, but
    you'll find many people who say crack marksmen don't need good vision, they
    must be using telekenesis because there's simply NO WAY they can see what
    they are hitting! The target is often totally obscured by the front sight
    post.
    
    <>
     From which we can conclude?
    1-The web is just the web, reliability varies.
    (or)
    2-There's something wrong with your eyes, or rulers.
    (or)
    3-YOU'RE AN ALIEN! Quickly, call Fox5!
    
    (Very big grin!)
    
    
    

       
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