There's a ton of advantages to having a CDS system. Leupold’s Custom Dial System® (CDS®) helps you easily compensate for bullet drop and make ultra-quick adjustments on the fly. You can customize your scope's elevation dial to match your exact load, velocity, and conditions for unprecedented precision. All it requires is for you to range your target, simply turn the dial to the correct position, aim dead on, and squeeze the trigger. Take a look at Fred Eichler using the CDS on a Rock River 223 rifle with Hornady 53 grain V-Max rounds as he sights in on targets at...