Thread: Rangefinding

Of course this assumes the deer is at the same elevations as you. If not, these is a little more maths to do to get a true horizontal distance:

If the deer is below you and at an angle of 15 degrees (measured using a app on your phone or inclinometer.

You need to use the Cosine of the angle and apply this factor to the distance above. Looks like this:

COSINE of 15 degrees is 0.9659, or 95.59% of the slope distance measure above:

636.8 x 0.9659 = 615 yards.

This is the distance that the the force of Gravity will effect the path of you bullet.