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Thread: Sighting in new sight formula

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    Rebel Dave is offline
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    Sighting in new sight formula

    I had the formula for moving or fileing your sights, to get them to point of aim, but i can not find it. Can some one post it, or a link to it. I have a musket that i want to sight in. The formula was something that used yards (in inches) and your sight radius, to tell you how much to move (or file off) your front or rear sight.



    Thanks Rebel Dave
    Past Member 14th Mississippi

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    Re: Sighting in new sight formula

    I can put it on the BB tomorrow, but if you would like I can send you an email with a chart that makes it easier.

    Dave
    DAVID FRANCE

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    Rebel Dave is offline
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    Re: Sighting in new sight formula

    Hi Dave

    You can send me the chart to my email at barracudadave67@hotmail.com But please post what info you have as it may help others .
    as allways

    Thanks alot for your help

    Rebel Dave
    Past Member 14th Mississippi

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    Re: Sighting in new sight formula

    The formula is sight radius (in inches) / range (in inches) = amt to move sight that will result in movement of bullet strike 1 inch.

    For instance, if you have a sight radius (distance from rear sight to front sight) of 24", and you want to move your group 3 inches to the left at 50 yards, then:

    24/1800=.013, .013x3=.039. So, you would move your front sight to the right (or rear sight to the left) .039" in this example. Works the same for elevation.
    Tom Magno, 9269V
    29th Wisconsin Volunteer Infantry

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    Rebel Dave is offline
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    Re: Sighting in new sight formula

    Tom

    Thanks for the formula.


    I made an index card to take to the range.

    Rebel Dave
    Past Member 14th Mississippi

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    Re: Sighting in new sight formula

    Quote Originally Posted by Rebel Dave
    Tom

    Thanks for the formula.


    I made an index card to take to the range.

    Rebel Dave
    1800"= 50 yards
    3600"= 100 yards
    Tom Magno, 9269V
    29th Wisconsin Volunteer Infantry

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    Re: Sighting in new sight formula

    Ok, according to my math I have to move my rear sight .032 inches. (Gun with 29 3/4inch sight radius shoots 2 inches to the left at 50 yds.)

    How do I make such a small measurement without going out and buying a micrometer?


    Bill
    remember that most free advice is worth what you pay for it.

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    Lou Lou Lou is offline
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    Re: Sighting in new sight formula

    Buy a cheap feeler guage
    Lou Lou Lou Ruggiero
    Tammany Regt-42nd NYVI

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    Rebel Dave is offline
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    Re: Sighting in new sight formula

    Old Chief

    If you tinker with muskets, It is probably a good investmet. You can get a cheap one at Harbor Freight Tools. You could also use a Vernier caliper. If you have to file it off, go easy, take a little off, and shoot a few shots, then check again. You can always take some off, it's putting it back on thats hard.

    Rebel Dave
    Past Member 14th Mississippi

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    Re: Sighting in new sight formula

    Quote Originally Posted by OLD CHIEF
    Ok, according to my math I have to move my rear sight .032 inches. (Gun with 29 3/4inch sight radius shoots 2 inches to the left at 50 yds.)

    How do I make such a small measurement without going out and buying a micrometer?


    Bill

    http://www.harborfreight.com/4-inch-...per-47256.html

    Cheap, and a good tool you will use a lot.
    Tom Magno, 9269V
    29th Wisconsin Volunteer Infantry

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