Vortex Optics VIPER XBR 2.5-10X44 CROSSBOW SCOPE User Manual

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rossBow

Cope

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The XBR scope requires 30 mm mounting rings of a medium or high
height. Most modern crossbows have a pre-installed Weaver base, so
your ring choice should be compatible with this type of base.

Due to the typically short stock used on crossbows, Vortex Optics
highly recommends using at least one cantilever or extension ring in
combination with a standard ring when mounting your scope. This
combination allows the scope to be placed in a more forward position
than possible when only using standard rings and provides the
optimal sight picture. Be sure the rings are identical in height.

TIP: For specific ring recommendations, please refer to the Viper
XBR product page at www.vortexoptics.com.

Eye Relief and Reticle Alignment

Install the bottom ring halves on the mounting base. Place the
crossbow scope on the bottom ring halves and loosely install the
upper ring halves. Before tightening the scope ring screws, adjust for
comfortable eye relief:

1. Set the scope to the middle of its magnification range.
2. Slide the scope as far forward in the rings as possible.
3. Look through the scope while in your normal shooting position
and slowly slide the scope towards your eye. Stop sliding the scope
when you see the full field of view.
4. Without disturbing the front-back placement, rotate the scope
until there is an exact match between the vertical crosshair of the
reticle and the vertical axis of the crossbow. Use a reticle leveling
tool, a weight hung on a rope, flat feeler gauges, or a bubble level to
help with this procedure.

After aligning the reticle, tighten and torque the ring screws down
per the manufacturer’s instructions. As a general rule, Vortex Optics
recommends torquing the ring screws to 16 in/lbs.

Use bubble levels to square the
crossbow scope to the base.
Shown on a Scorpyd reverse
draw crossbow.

Due to typically short stocks used on crossbows, Vortex highly
recommends using a cantilever ring with the Viper XBR scope.