Originally Posted by maestro
This is rather for firearms, isn't too precise in air rifle shooting (because the drag of gravity is only one thing, but the pellet still travels the real distance in the air). And when the target is closer to you than the top of your trajectory, using the rifleman's rule will make things only worse for you!!!
As a rule of thumb, below 15 yards do nothing & below 15 degrees do nothing, above use the measured distance and clicks but aim a bit lower. You can calculate with Chairgun, exactly how much, depending on distance, inclination angle, pellet type, energy etc.
'Scuse me, but bullets travel the real distance too.
I have seen strange effects below 15 yards and chairgun didn't work for me, that is why I say measure it.