`I have a Leupold with B&C reticle and Bushnell Elite. They both work very well. I sight them in dead on at 200 yards and then shoot each line at that range. I then go to a ballistics program to figure out where the dead on is for each line/dot. This seems to work perfectly, but you have to know the bc of your bullet and the velocity for it to be exact.
Nikon Buckmasters are good scopes. I have had one on a 6mm for many years and it has been great.
I have both and use both (bdc/custom ballistic turret). I have no problem using either, with a bdc you need to match magnification to your load and then practice or confirm the stadia marks. Do not trust published velocities listed on factory ammo.
I figure my lines at max power, as I believe that you don't need them at a lesser power. If I shoot at a 300-yard animal, then the main crosshair will do anyway with my 7 mag. It can be at whatever power that I want. If it is extended range, where I need the drop comp, then I figure that I will have it on max power anyway.
If you try to figure it based on different powers, it can be confusing when the excitement hits. Just figure each line/dot at max power and be done with it.