Re: newbee help
FFP = front or first focal plane, ( in effect, with a first focal plane optic, the reticle gets larger as you increase the variable power and shrinks when you decrease the variable power. so that, the reticle image , always covers/subtends the same distance, regardless of power setting)
by definition all fixed power scopes are first focal plane .
sooo, in contrast, a second focal plane optic has one spot in its focal power range that allows the reticle to be used for measurement by the shooter; typically this is the highest power setting.
the reticle does not shrink or grow larger; and if you forget to dial 'up' to the proper setting for MILLING a target, the range to the target you figure will be OFF
mil/mil reticle is a mil-radian reticle (ie., mil-dot ) AND
the scopes elevation /windage adjustments or clicks are in mil's as well or really some fraction of a whole mil-radian