Armasight NRWVULCAN439DB1 Vulcan 4.5X Gen3 Bravo MG - Compact Professional 4.5x Night Vision Rifle Scope - Manual (Page 23)

23
1
FIGURE 3-9. VULCAN CONTROLS
4
2
3
5
6
7
The Armasight Vulcan Mil-dot reticle is a reliable means of determining distances to targets, establish-
ing leads for moving targets, and for alternate aiming points for windage and elevation holds.
Dots are spaced in one mil (milliradian) increments on the crosshair. A distance to target can be calcu-
lated using the mil formula, that is based on the size of the object being targeted.
Look through the scope, and bracket the object between dots.
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.
By measuring the height or width of a known (or approximately known target size) in mil-radians using
the reticles, the target distance can be calculated as follows.
R = range in meters, H = target size in meters, M = mil-radians of the image size: R = 1000 * H / M
Military shooters are trained to know that the common male torso is 39 inches from crotch to top of
head. This is very close to exactly one meter.
This formula then becomes R = 1000 / M for a one meter target size.
All of the following formulae are equivalent to the one above for estimating range.
R = range in meters, H = target size in inches, M = mil-radians of the image: R = 25.4 * H / M
R = range in yards, H = target size in inches, M = mil-radians of the image: R = 27.78 * H / M
R = range in yards, H = target size in feet, M = mil-radians of the image: R=333.3 * H / M
1 mil
1 mil
FIGURE 3-10. MIL-DOT RETICLE