Nightforce Optics, NXS 2.5-10x42mm, MIL-R Reticle

Range estimation

The Nightforce MIL-R™ reticle can provide you with an accurate distance to your target, when the size of the target is known, by utilizing one of the following Mil relation formulas:

Target Size in Inches ÷ Image Size Measured in Mils in Reticle x 27.77 = Distance in Yards
Target Size in Inches ÷ Image Size Measured in Mils in Reticle x 25.4 = Distance in Meters
Target Size in Centimeters ÷ Image Size Measured in Mils in Reticle x 10.93 = Distance in Yards
Target Size in Centimeters ÷ Image Size Measured in Mils in Reticle x 10 = Distance in Meters
For example, a standard stop sign measures 30” tall x 30” wide. Knowing the size of the target, in this case, a stop sign, and applying the correct formula above, you will be able to accurately calculate the distance to your target.

Known target size = 30”
Image size = 2.5 Mils. To measure image size of target in Mils, refer to the reticle diagram above.
Divide target size (30”) by image size in reticle (2.5) = 12
For distance in yards, multiply 12 x 27.77 (constant) = 333.24 yards to target.
For distance in meters, multiply 12 x 25.4 (constant) = 304.8 meters to target.
Your ability to accurately measure your target in your reticle does take some practice to become proficient.