Vortex Optics VIPER HS LR 6-24X50 RIFLESCOPE User Manual

The Viper® XLR Reticle

Designed to maximize long distance shooting and ranging abilities, the

®

Viper

XLR™ MOA reticle can be used to effectively determine ranges,
holdovers, windage, and moving lead corrections. Ultra-precision laser
etching on the glass reticle ensures that MOA specifications will be kept
to the tightest tolerances possible. The fine center crosshair subtensions
on the XLR MOA reticle were carefully chosen to provide the optimum
balance between precision aiming and low light visibility.

Note: The XLR reticle images are shown as seen through the
Viper HS LR 6-24x50 riflescope. The appearance of the XLR
reticle in other models may have slight variations.

2

XLR Reticle with MOA Subtensions

3 2

3

MOA Subtensions

The XLR reticle is based on minute-of-angle (MOA) subtensions.
MOA measurements are based on degrees and minutes: 360 degrees
in a circle, 60 minutes in a degree for a total of 21,600 minutes. These
angular measurements are used to estimate range and correct for bullet
trajectory drop in riflescopes. 1 MOA will correspond to 1.05 inches at
a 100 yard distance, 2.1 inches at 200 yards, 3.15 inches at 300 yards,
and so on.

First Focal Plane Reticles

When used in a first focal plane riflescope, such as this Vortex Viper
HS LR riflescope, the MOA subtensions of the XLR reticle are
valid at all magnification levels. This means the shooter can use the
magnification level most appropriate for the situation and still have
effective holdover and windage reference marks.

This is extremely valuable in a high-stress situation because the
shooter does not have to remember to set the scope to one particular
magnification to get valid holdovers—an action necessary in the more
common second focal plane reticles.

Estimating MOA

Although 1 MOA is very commonly corresponded to 1 inch at 100
yards, this is not quite correct 1 MOA at 100 yards equals 1.05 inches.
Calling 1 MOA an inch per 100 yards may be acceptable at shorter
distances, but it will cause a five percent error in ranging and holdover
adjustments. This will result in missed shots at longer distances.

Viper XLR Reticle

∅D3 (center dot)

A

XLR Re ticle Subtension s (MOA)

Model A B D1 D2 D3 S X1 X2 X3

2.5 –10 x32 2.00 .21 .24 .33 .20 .6 2.0 1.0 2.0

4–16x5 0 3.13 .15 .26 .39 .15 .45 1.0 .5 2.0

6–24x50 2.08 .10 .17 .26 .10 .3 1.0 .5 2.0

B

∅D2

∅D1

X3

(open center)

S

X2

X1

4

5 4

5