Looking at purchasing a Nikon M-223 3-12x42SF for my LE6920. Shooting from 100-400 yds so far. But I'm not sure whether to go with the Nikoplex or BDC.
really personal choice im sure the bdc is helpful at longer ranges but you may have to put a little effort in learning bullet drop at different ranges and different magnifications.
The Nikon "Spot On" site does all this for you. I have a friend that just mounted a Monarch with the BDC. He loves it and did all the calculation out on their website. He showed me pictures of his target, and they were "spot on"