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

[Mitz28]

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

 

[Michael Eichele]

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.

 

[Mitz28]

I never said quickly.

 

[yukonal]

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.

 

[elkaholic]

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

 

[Mitz28]

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.

Thanks a lot for that!

 

[Michael Eichele]

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.

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.