Vortex Optics VIPER PST 1-4X24 RIFLESCOPE - Manual (Page 5)

RIFLESCO PE
9 8
Ranging Example
The TMCQ MOA reticle can be used for approximate range estimations
using a simple formula. To use this formula, it will be necessary to know
the size of the target or a nearby object in inches.
Begin by turning the 1–4x24 riflescope to a magnification of 4x. Using
the inner crosshair with listed MOA dimensions (see subtension
diagram), match up to target object and estimate the number of MOAs
spanned by the object (see example).
Maximum accuracy in ranging will be obtained by calculating MOA
measurements as closely as possible and will depend on a very steady
hold. The rifle should be solidly braced using a rest, bipod or sling when
measuring.
Target Size (Inches) x 100
MOAs Measured
Range (Yards) =
MOA Ranging Formula
Ranging a 6-foot target (72 inches) at 15 MOAs yields 480 yards.
72 x 100
15 MOA
480 Yards =
Note: In the above MOA ranging formula, 100 has been substituted for
the technically correct 95.5 in the interest of speedier calculations. Be
aware that this will produce a five percent over-estimation error of the
yardage distance obtained. If maximum ranging accuracy is preferred, use
95.5 instead of 100 in the formula.
The inner heavy circle can also be used as a quick ranging reference. If the
inner heavy circle spans half a 6-foot target’s height, it will be approximately
200 yards away. If the standing target completely spans the inside of the
circle, it will be approximately 400 yards away. If the target only fits inside
half of the inner circle, it will be approximately 800 yards away.
200 Yards 400 Yards 800 Yards