Vortex-optics CROSSFIRE 4-16X50 AO - MIL DOT ILLUMINATED User Manual download pdf (Page 2)

When used with second focal plane riflescopes it is very important

to understand that in order to use the listed subtensions

correctly, the scope must be set to a particular magnification

(usually the highest). Consult the riflescope owner’s manual for

the correct magnification to be used. Of course, the standard

center crosshair can always be used at any magnification.

Vortex Mil Dot Reticle

The Vortex Mil Dot reticle is an extremely versatile reticle allowing

the user to do range estimations, holdover and wind drift

compensation, as well as moving target leads.

The mil dot reticle subtensions are based on the milliradian

(mrad for short). Mrad unit of arc measurements are based on

the radian. A radian is the angle subtended at the center of a

circle by an arc that is equal in length to the radius of the circle.

These angles and arc scales are used to estimate range and bullet

trajectory drop with

the mil dot reticle.

There are 6.283

radians in a circle and

1000 milliradians in

a radian for a total

of 6283 milliradians

(mrads) in a circle.

An mrad will subtend

3.6 inches at a distance of 100 yards. Most riflescopes with mrad

adjustments use .1 mrad clicks which subtend .36 inches at 100

yards.

Vortex Mil Dot reticle

subtensions shown in milliradians

(mrad or mils).

100 yards ------------------------ 3.6 inches

200 yards ------------------------ 7.2 inches

300 yards ----------------------- 10.8 inches

400 yards ----------------------- 14.4 inches

500 yards ----------------------- 18.0 inches

600 yards ----------------------- 21.6 inches

700 yards ----------------------- 25.2 inches

800 yards ----------------------- 28.8 inches

1 Mil Width at Distances

Vortex Mil Dot Reticle

1 2 3 4 5

No comments

Vortex-optics CROSSFIRE 4-16X50 AO - MIL DOT ILLUMINATED User Manual Page 2