Formula for shooting in a cross wind..

Discussion in 'The Basics, Starting Out' started by kc, Jan 17, 2003.

  1. kc

    kc Well-Known Member

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    How can I shoot long range with a cross wind?
    also, what is the mathamaticl formula.
    Thank you" Keith....
     
  2. ewallace

    ewallace Well-Known Member

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  3. Michael Eichele

    Michael Eichele Well-Known Member

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    Keith,

    Some math would include:

    An example for calculating wind would be like this: 3000’ (range in feet) divided by muzzle velocity (2600) = 1.1538. The real time of flight for STANDARD air density would be (at 1000 yards) 1.7651 using a 168 grain .308 caliber bullet @ 2600 FPS. Then, 10 miles per hour times inches per second (10x17.6)=176.0 Next take the real time of flight and subtract the time of flight as if there was no atmosphere (1.7651-1.1538)=0.6113 This is the delay time, now multiply the delay time by the inches per second (.6113x176)=107.58 inches at 1000 yards.

    Its very hard to do it this way if you cant determine the real time of flight in the current air density. That is a whole other subject.