I'm no long-range shooting expert, don't claim to be. But, I AM a deer-hunting nut. I've used the Nikon BDC reticule a bit and last year got a Leupold CDS dial put on my VXR. I think both systems work and it is largely a matter of preference. The biggest thing is that you actually need to shoot and see where your bullets are actually impacting at that range. I don't shoot (animals) way out there (500 yards or more). So, in truth a lot of my shooting could just as easily be done with a 200 yard zero and a single duplex reticule with no external adjustments. However, it is nice to be able to range an object where you expect an animal to come from (tree, rock, etc) and then dial the scope to that range. One advantage that I do see to the CDS system (and this idea was stolen from Dave Petzal) is that you can shoot heavy for caliber bullets in moderate cartridges (i.e. 200 gr. Accubond in 30-06) and be able to make accurate hits without having to employ Kentucky Windage.
