Vortex Optics RAZOR HD 5-20X50 RIFLESCOPE — First Focal Plane User Manual
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Target Size (Yards) x 1000
mrads Read
Range (Yards)
=
To use these formulas, you will need to know the measured
size of the target or a nearby object. Using either the
vertical or horizontal mrad scale, place the reticle on
the target of known measurement and read the number
of mrads spanned. Maximum accuracy in ranging will
be obtained by calculating exact mrad measurements—
mrads should be estimated in tenths if possible. To help
calculate fractions of mrads, the EBR-2B reticle uses .5
mrad graduations on inner portion of crosshair and .2 mrad
graduations on outer part. Windage dots are marked in .2
mrad spacing. All inner crosshair line thickness subtend .06
mrads and coarse outer crosshairs subtend .8 mrads.
Ranging
Accurate measuring will depend on a very steady hold. The
rifle should be solidly braced using a rest, bipod or sling
when measuring. Once you have an accurate mrad reading,
use the any of the formulas to calculate the distance.
Ranging a 6-foot target stand (2 yards) at 4 mrads to get 500 yards.
Mrad reticles such as the EBR-2B are very effective for
ranging using simple formulas.
Target Size (Meters) x 1000
mrads Read
Range (Meters)
=
Target Size (Inches) x 27.8
mrads Read
Range (yards)
=
Mrad Ranging Formulas
2 x 1000
4 mrads
500 Yards
=