shooting over water
my buddy, a damn good shot and he knows his stuff. Was 81 degrees, at sea level BP and humidity were stable. Target at 835 yards he was hitting about 2 MOA high, with a 260 match. Recalculated everything and still hitting bout 2 moa high. The kicker- 700 yards of this shot was over water. We know that the humid air weighs less than dry air...
My question how do you calculate for this? What is the part of the equation that I am failing see?
My question how do you calculate for this? What is the part of the equation that I am failing see?
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http://en.wikipedia.org/wiki/Psychrometrics
Maybe the friction factor is less too due to the water vapor.0 -
CbtEngr01,
Air mixed with water vapor is less dense than dry air. The bullet impact will be higher.
How high is a function of the density, figured by measurement, but your situation is slightly different due to the existence of dry land to some extent.
As a side note, many states have laws stating that it is illegal to shoot rifles and pistols over water. I realize that private property laws or rules might give you some leeway but I thought I would just pass that along.
Best.0 -
Run some simple trajectory charts, varying the environmntal conditions. I think you'll see that the effects are very small. 0
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