Thread: Sighting a 223 for longer shots

I know there is a lot of variability in this however. I am keen to know what height above center is preferred when sighting a 223 in at 100m for longer shots to be zeroed at 200m to account for various ammunition types.
I ask this as I have chosen to keep my 223 light and handy running a Leupold Vx3 2.5-8x36 which does not dial. Currently have it sitting at approx. 2" high with 55-60gr ammo.