I have a Leupold Ultimate Slam MLer Scope with the BDC, I used the BDC for one season then I quit using it. For me the easiest way I found is for me to sight in 2" high at 50yds. By doing this all I have to do is hold on the heart on shots 50yds and under, hold dead center on shots out to 125yds and hold top of the lungs on shots from 175 t0 200yds.
I know what's 50 a 100, 150 and 200 so it's simple, just hold on the kill area and fire. Even if I forget to hold low at close shots and hold dead center Im still in the top of the Lungs, and if I underestimate the longer shots and hold dead center Im still in the heart. Most of the time I just hold dead center lungs and Im good with shots 75 to 150, that's where most of my shots are and it has'nt let me down yet.
This is with a 240gr XTP Mag Bullet and a 110gr Load of Pyrodox RS. I dont worry or guess I just hold in the kill area and shoot.
(BP)