This reticle was developed in the late 1970's to help U.S. Marine Snipers estimate distance, and is now standard for all branches.
Dots are spaced in one mil (milliradian) increments on the crosshair. Using the mil formula, a table can be created that is based on the size of the object being targeted.
Just look through the scope, bracket the object between dots, and refer to the table for an estimated distance to target.
The Mil. Dot reticle is available for all tactical scopes. The Mil. Dot is also available for the Vari-X III 2.5-8x36mm, M8-12x40mm Adj. Obj. Varmint, and the Vari-X II 4-12x40mm Adj. Obj.
The space between dot centers subtends one milliradian(mil). One mil. subtends 3.6 inches at 100 yards or 36 inches at 1,000 yards. To use this system effectively you must know the size of the target.
Please note that some Mil. Dot reticle scopes are calibrated to be used at one magnification. Check this out! If your scope is a 3.5-10 the correct magnification is 10x. On the 4.5-14 use 14x. The use of any other magnification will give inaccurate results.
Practice Mil Dot ranging with 70 different range exercises, plus an advanced stage for each caliber with 25 different timed hold-offs and moving targets. Almost 300 different ranging scenarios!