Quote Originally Posted by 1983Weatherby View Post
Basically allows you to dial in the speed. Very useful to dial in your drop compensation of a particular grain bullet. If you know the bullet grain, the muzzle velocity and are zero'd at a certain distance you can compensate for bullet drop. You would also need to know the bullets BC.

Very useful for long range shooting. Not so useful from 400 yards or less IMO.

Check out the application "Bullet Flight". You can play with it and see what I mean.

You punch in the info, then the wind angle, the temp and a few other items and can pretty much guarantee shots every time if you are a decent shot. Especially with a scope that has MOA reticle and exposed turrets so you can adjust on the fly.
+1.......