Calculating angle of shot by yardage and alt

Discussion in 'Long Range Hunting & Shooting' started by DropDead, May 31, 2009.

  1. DropDead

    DropDead Well-Known Member

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    Hello, this is my first post, first off great sight and wealth of information!​
    I was wondering if there was any way to calculate angle of shot by using range info from a NON arc rangefinder and getting altitude with gps at shooting location and target location.
    Surely thier must be away but so far my searches on the web have been unsuccessful, probably my phrase input.

    Thank you in advance!
     
  2. Ridge Runner

    Ridge Runner Well-Known Member

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    I just use a 10 dollar angle finder from ace hardware, just stick the magnetic base on the bottom of the barrel and it immediately gives you a reading.
    RR
     

  3. DropDead

    DropDead Well-Known Member

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    Thats great, Thank you very much!
    Will definately purchase one of those!
     
  4. justgoharder

    justgoharder Well-Known Member

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    I've used the same method before. I've also put the meter on my range finder before too. I've also used a string attached to on of the mil-dot calculators. However, while each of those worked and was pretty cheap, if you can get one of the ACI that mount to the scope or rings or base, IMHO it's really the way to go.
     
  5. DropDead

    DropDead Well-Known Member

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    Thanx alot for input, and I agree that the ACI is the way to go, and one day I will probably purchase one, actually the version that also has the anti cant level on it aswell. But for the moment I was looking for a cheap alternative.
     
  6. Kevin

    Kevin Well-Known Member

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    Here is what you need to do to find the horizontal distance by the method you suggest.

    ((straight line range)^2-(elevation difference)^2)^.5

    most cell phone calculators are capable of this. Make sure you use the same units.

    For example 1000 yards line of sight 600ft vertical equals 200yards vertical.

    ((1000)^2-(200)^2)^.5 = 980 yards

    if you want to know the angle that is then take arctan(200/1000) = 11.3 degrees
     
  7. Coyboy

    Coyboy Well-Known Member

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    I use my compass, it has a small bubble of air in it. I set it at 0 and lay the long flat on the barrel as it points to target and get a degree reading off of it. The bubble tells you the angle.
     
  8. DropDead

    DropDead Well-Known Member

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    Hey Thanks alot, i figured thier must be some formula. Thats a little complex for me but i did eventually get it right after i found parrethesees on a scientific calculator on computer, i got an answer of 979.79589711327123927891362988236 yards so i imagine i computed it correctly.
    Very interesting, will be fun to experiment with while out target practicing.
     
  9. DropDead

    DropDead Well-Known Member

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    That sounds cool, i could use a new compass, could you point me in the right direction? lol no pun intented
     
  10. Kevin

    Kevin Well-Known Member

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    Yeah, you did it right, I just rounded a little.