Vortex Optics VIPER XBR 2.5-10X44 CROSSBOW SCOPE - Manual (Page 4)

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Windage and Elevation Adjustments
The Viper XBR scope features precision finger-adjustable elevation and
windage dials with audible clicks.
To make adjustments:
1. Following the directional pointer
on the turret cap, turn the dial in
the direction you wish the arrow’s
point-of-impact to go: up or down, left
or right.
2. Replace the outer cover on the
windage turret when done.
TIP: After sight-in, you can re-align
the zero marks on the windage turret
dial with the reference dots if you wish (see Indexing the Windage Dial with
Zero Reset on page 18).
MOA Adjustments
The Viper XBR crossbow scope uses finger adjustable elevation and
windage turrets with scales measured in minutes of angle (MOA).
MOAs are a unit of angular measurement which approximately
equals one inch at 100 yards.
• The tactical-style elevation turret design provides a high
travel range along with rapid adjustment ability. Each click of the
elevation turret will provide
1 MOA of reticle movement.
• The windage turret features a standard design with an external
cap. Each click of the windage turret will provide
1 MOA of
reticle movement.
Elevation Dial
Windage Dial
MOA at Common Distances
Remember that one click of the turret equals 1 MOA.
1 MOA = 1 inch at 100 yards
1/2 inch at 50 yards
1/3 inch at 33 yards
1/4 inch at 25 yards
1/5 inch at 20 yards