Reticle Types and Characteristics:
A reticle is the crosshair or pattern placed in the eyepiece of the riflescope which establishes the gun's position on the target. The inner workings of a scope have a direct affect on shooting accuracy. As adjustments are made during sight-in, the cam tube, which holds the reticle and lenses in place, moves inside the scope. To stay on target and produce a quality image, this tube must be strong enough to absorb the impact of heavy recoil during shooting and remain in place.
MilDot RecticleA Shooters Guide to Understanding Mils and MOA (pdf)
FREE and Cheap Ballistic apps for your Android phone
Videos:
How to use mil to estimate distance by the National Shooting Sports Foundation
Understanding Minute of Angle by the National Shooting Sports Foundation
