G7 reticle, How to?

[RangerBrad]

Hey fellas, On the G7 scope I believe I understand that the windage hash marks represent 1moa at 11 power and 2 moa at 22 power but how do I use the distance hash marks as all calibers and velocities shoot diffrently? The scope came with an owners manual and reticle manual that covered their reticles specifcaly but, didn't have the G7 reticle specific information. Thank's, Brad