Thankyou, but to be clearer to me, can you please explain how to exactly do that with a 2 nd focal plane scope? For instance...if I want to hold off 1 moa at 600 yards, I know that 1 moa is 6 inches, but if I use the moa, s on my retical, heing 2nd focal plane, how do I hold using the 1 moa...