The advantage with telemetric reticles (like rangefinder & Mil-dot etc) is that the target image and distance between dots remains constant even when changing magnification. It is the system that is widely used by the TOP military suppliers now.


With a first-focal-plane reticle, which expands and contracts in synch with the target image, you will be able to employ the comparator guide marks at any magnification you select as appropriate to making the shot.