the certificate enclosed with the CDS scopes lets you get one elevation knob marked in yards for the bullet/muzzle velocity and atmospheric conditions and elevation. this in nice, because once that's done, you just ping the target with the LRF and dial the knob to what the range finder tells you.
the M1 knobs are marked in MOA and need a range card or ballistics program to give you how many MOA for X distance. a little more complex but more flexible.
