How bullet impact is affected by altitude and temperature...

Discussion in 'Long Range Hunting & Shooting' started by Mitz28, Jul 15, 2009.

  1. Mitz28

    Mitz28 Member

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    Anyone have some useful formulas on how bullet impact is affected by altitude and temperature?
     
  2. Michael Eichele

    Michael Eichele Well-Known Member

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    It involves calculus so no there arent any usefull formulas to quickly figure it out.

    The quickest is to use a ballistic calculator on a pocket PC in the field.
     

  3. Mitz28

    Mitz28 Member

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    I never said quickly.
     
  4. yukonal

    yukonal Member

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    I can give you an example, as I looked into the same thing yesterday.

    The difference in bullet drop with my load(.417 B.C.@2800) between 980 elevation and 5000 elevation, is only 2" at 500 yards. Temp. remaining the same.
     
  5. elkaholic

    elkaholic Well-Known Member

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    I use the jbm ballistics calculator on line and then produce a laminated chart for my particular application for field use.........Rich
     
  6. Mitz28

    Mitz28 Member

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    Thanks a lot for that!
     
  7. Michael Eichele

    Michael Eichele Well-Known Member

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    Those are typical results. Out to 600 yards there is ussually no point in looking any further that your drop chart. Past that however such as 700 and beyond, the difference between 980' and 5000' is enough for a clean miss.