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The Vortex®Viper®HS LR™ riflescopes are intended for dedicated
long range hunters. Using a specially designed uncapped, rapid travel
elevation turret with our CRS zero stop, this riflescope accommodates
the unique needs of hunters who prefer to “dial in” elevation adjustments
for long range shots.
The Viper HS LR series riflescopes also provide an ideal platform for
the optional Vortex TMT custom turret caps.
The Focal Plane
All riflescope reticles can be termed either first focal plane (FFP) or
second focal plane (SFP), depending upon their internal location within
the riflescope. This model features the first focal plane design.
First Focal Plane Reticles
First focal plane (FFP) reticles are located near the windage and
elevation turrets in front of the image-erecting and magnifying lenses.
This style of reticle will visually grow and shrink as you change the
magnification. The main advantage of an FFP reticle is that the reticle
subtensions used for ranging, holdovers, and wind drift corrections
are consistent at all magnifications. The reticle is heavier at higher
magnifications and finer at lower magnifications.
The Viper HS LR riflescope uses a fast focus eyepiece designed to quickly
and easily adjust the focus on the riflescope’s reticle.
To adjust the reticle focus:
1. Look through the riflescope at a
blank white wall or up at the sky.
2. Turn the eyepiece focus knob in
or out until the reticle image is as
crisp as possible.
Note: Try to make this particular adjustment quickly, as the eye will try to
compensate for an out-of-focus reticle.
Once this adjustment is complete, it will not be necessary to re-focus
every time you use the riflescope. However, because your eyesight may
change over time, you should re-check this adjustment periodically.
Looking directly at the sun through a riflescope, or any optical instrument,
can cause severe and permanent damage to your eyesight.
Windage and Elevation Adjustments
The Vortex Viper HS LR riflescope incorporates precision finger
adjustable elevation and windage dials with audible clicks.
To make adjustments:
1. Turn the adjustment knob in the
appropriate direction: Up/Down or
Left/Right as indicated by the arrows.
2. Following the directional arrows, turn
the knobs in the direction you wish the
bullet’s point-of-impact to go to.
Note: After sight-in, you can re-align the zero marks on the turret knobs with the reference dots if you wish (see Indexing Adjustment Dials with Zero Reset on page 15). Replace outer
covers when done.
The Viper HS LR riflescopes use finger adjustable elevation and windage
turrets with scales measured in minutes of angle (MOA). MOAs are a unit
of arc measurement which equals 1.05 inch for each 100 yards. Examples:
2.1 inches @ 200 yards, 3.15 inches @ 300 yards, etc.
The tactical-style elevation turret is designed to provide a high travel range
along with rapid adjustment ability. Each click will provide ½ MOA of
reticle movement (approximately ½-inch @ 100 yards).
The windage turret uses a standard design with an external cap. Each click
will provide ¼ MOA of reticle movement (approximately ¼-inch @ 100
Vortex Viper HS LR riflescopes incorporate Vortex’s patented Radius
Bar to visually assist in keeping track of turret rotations. The Radius Bar
provides a quick visual reference that allows the shooter to confirm:
• Knob orientation is correct and has
not shifted as a result of accidental
• Knob orientation is at the zero point
when using the CRS feature.
• By watching the position of the bar
while making elevation adjustments, the
shooter is able to quickly track full, half
and quarter rotations.
To get these benefits from the Radius Bar, the “0” mark on the turret must
be indexed with the zero reference line on turret post (see Setting the CRS
Stop and Indexing Elevation Knob on page 14).
Variable Power Adjustments
To change the magnification, turn the magnification ring to the desired level. The Vortex fiber optic magnification indicator will provide a low light reference for magnification level.
Customizable Rotational Stop (CRS)
Viper HS LR riflescope elevation turrets incorporate the unique CRS
rotation stop feature. After the rifle is sighted in, the design of the
CRS allows a shooter to quickly and easily return to an original zero
point when using the elevation turret to dial-in temporary bullet drop
The CRS feature is particularly useful when dialing large multi-revolution
elevation corrections. Without this feature, the shooter must pay very
careful attention when dialing these large corrections. If the shooter loses
track of the number of revolutions, the original zero point may become
lost when returning the adjustment. Viper HS LR riflescopes equipped
with the CRS allow the elevation dial to be quickly spun back to original
zero without having to carefully count revolutions or clicks.
Once the CRS shims are installed after sight-in, the elevation dial will
stop turning shortly past the original zero point when being returned
(turning clockwise direction) from a temporary elevation adjustment.
The shooter can then turn the elevation knob a partial turn in a counterclockwise direction until the zero reference and radius bar are correctly
aligned—achieving the original zero point.
Using the Side Focus
Viper HS LR riflescopes use a side focus adjustment which provides
maximum image sharpness and eliminates parallax error.
Setting the side focus:
1. Be sure the reticle is correctly
focused (see Reticle Focus on page 5).
2. Turn the side focus knob until the
target image is as sharp as possible.
The yardage numbers referenced on
knob should closely match the actual
yardage to the target.
3. Check for parallax error by moving
your head back and forth while looking
through the scope. The focus is correct if there is no apparent shift of
the reticle on the target. If you notice any shift, adjust the focus knob
slightly until all shift is eliminated.
Parallax is a phenomenon that results when the target image
does not quite fall on the same optical plane as the reticle
within the scope. When the shooter’s eye is not precisely
centered in the eyepiece, there can be apparent movement of
the target in relation to the reticle, which can cause a small
shift in the point of aim. Parallax error is most problematic
for precision shooters using high magnification.
To get the best performance from your Viper HS LR riflescope, proper
mounting is essential. Although not difficult, the correct steps must be
followed. If you are unsure of your abilities, it would be best to use the
services of a qualified gunsmith.
Rings and Bases
Mount an appropriate base and matching rings to your rifle according
to the manufacturer’s instructions. The Vortex Viper HS LR riflescopes
require 30 mm rings.
Use the lowest ring height that will provide complete clearance of scope
and rifle—avoiding any contact with barrel, receiver, bolt handle or any
other part of the rifle. A low mounting height will help assure proper
cheek weld, aid in establishing a solid shooting position, and promote fast
Eye Relief and Reticle Alignment
After installing the bottom ring halves on the mounting base, place the
riflescope on the bottom ring halves and loosely install the upper ring
halves. Before tightening the scope ring screws, adjust for maximum eye
relief to avoid injury from recoil:
1. Set the riflescope to the middle of its magnification range.
2. Slide the riflescope as far forward as possible in the rings.
3. While viewing through the riflescope in a normal shooting
position, slowly slide the riflescope back towards your face. Pay
attention to the field of view. Stop sliding the riflescope back as soon
as you see the full field of view.
4. Without disturbing the front-back placement, rotate the riflescope
until the vertical crosshair exactly matches the vertical axis of the
rifle. Use of a reticle leveling tool, a weight hung on a rope, flat feeler
gauges, or a bubble level will help with this procedure.
After aligning the reticle, tighten and torque the ring screws down per the
Initial bore sighting of the riflescope will save time and money at the range.
This can be done in a number of ways. A mechanical or laser bore sighter
can be used according to the manufacturer’s instructions. On some rifles,
bore sighting can be done by removing the bolt and sighting through the
To visually bore sight a rifle:
• Place the rifle solidly on a rest and remove the bolt.
• Sight through the bore at a target approximately 100 yards away.
• Move the rifle and rest until the target is visually centered inside the
• With the target centered in the bore, make windage and elevation
adjustments until the reticle crosshair is also centered over the target.
Final Range Sight-In and CRS Stop-Set
After the riflescope has been bore-sighted, final sight-in and CRS stop-set
should be done at the range. Sight in and zero the riflescope at the preferred
distance using the exact ammunition expected to be used while shooting.
100 yards is the most common zero distance, although a 200 yard zero may
be preferred for long range applications.
Be sure the reticle is in focus (see Reticle Focus on page 5) and
set the side focus adjustment to match the distance being used for
1. Following all safe shooting practices, fire a three-shot group as
precisely as possible.
2. Next, adjust the reticle to match the approximate center of the shot
group (see Windage and Elevation Adjustments on page 6).
Note: If the rifle is very solidly mounted and cannot be moved, simply
look through the scope and adjust the reticle until it is centered on the
3. Carefully fire another three-shot group and see if the bullet group is
centered on the bullseye.
This procedure can be repeated as many times as necessary to achieve a
Setting the CRS Stop and Indexing Elevation Knob
After obtaining a satisfactory zero, the CRS stop can be set using the
1. Loosen the three turret cap retaining screws on the elevation turret.
Gently pull the turret cap straight up and off of the turret post—being
careful not to rotate the turret post.
2. Slide the CRS shims on the center section of the turret post below
the V-grooved part.
3. After filling the center gap on the post with shims, replace the
4. Align the turret cap so the “0” mark on the cap matches up with the
“0” reference line on the turret post. Again, be sure not to rotate the
actual turret mechanism in the process.
5. Re-tighten the retaining screws, but do not overtighten. Use of
thumb and forefinger on the short end of the hex wrench will provide
Indexing Windage Dial with Zero Reset
Viper HS LR riflescopes feature a windage dial that will allow you to
re-index the zero indicator after sight-in without disturbing your settings.
This allows you to quickly return to your original zero if temporary windage
corrections are used in the field. Index the windage dial in this way:
Using the CRS Zero Stop
Once the CRS shims are installed, the elevation dial will stop turning
shortly past the original zero point when being returned (turning clockwise
direction) from a temporary elevation adjustment.
If re-zeroing at a future time, be sure to remove all CRS shims before
The fully waterproof and fogproof Viper HS LR riflescope requires very
little routine maintenance other than periodically cleaning the exterior
lenses. The exterior of the scope may be cleaned by wiping with a soft,
When cleaning the lenses, be sure to use products, such as the Vortex
Fog Free cleaning products or LensPen, that are specifically designed for
use on coated optical lenses.
• Be sure to blow away any dust or grit on the lenses prior to wiping the
• Using your breath, or a very small amount of water or pure alcohol,
can help remove stubborn things like dried water spots.
All components of the Viper HS LR riflescopes are permanently lubricated,
so no additional lubricant should be applied.
Note: Other than removing the turret caps, do not attempt to disassemble
any components of the riflescope. Disassembling of riflescope may void
If possible, avoid exposing your Vortex riflescope to direct sunlight or any
very hot location for long periods of time.
Many times, problems thought to be with the scope are actually mount
problems. Be sure that correct base and rings are being used in the correct
orientation, and that the base screws and rings are tight. Insufficient
windage or elevation adjustment range may indicate problems with rings,
base, base alignment, base mount holes drilled in the rifle’s receiver, or
Check for Correct Base and Ring Alignment
• Roughly center the reticle by adjusting both windage and elevation
turrets to the mid point of their travel ranges.
• Attach bore sighter, or remove bolt and visually boresight rifle.
• Look through the scope. If the reticle appears way off center on the
boresighter image or when compared to the visually centered target when
looking through rifle’s bore, there may be a problem with the bases or rings
being used. Confirm that correct base and rings are being used—and in the
Tips for Solving Bullet Grouping Problems
• Maintain a good shooting technique and use a solid rest.
• Check that all screws on rifle’s action are properly tightened.
• Be sure rifle barrel and action are clean and free of excessive oil or
• Check that rings are correctly torqued per the manufacturer’s instructions.
• Some rifles and ammunition don’t work well together—try
different ammunition and see if accuracy improves.
THE VIP WARRANTY
We build optics based on our commitment to your absolute satisfaction.
That’s why Vortex products are unconditionally guaranteed and we make
this Very Important Promise to you—a Very Important Person.
Rest assured that in the event your Viper HS LR riflescope becomes
damaged or defective, Vortex Optics will repair
or replace the riflescope at no charge to you.
Call Vortex Optics at 800-426-0048 for prompt,
professional, and friendly service.
2120 West Greenview Drive
Middleton, WI 53562
Note: The VIP warranty does not cover theft, loss, or deliberate damage
to the product.
Vortex Optics believes strongly in responsible, ethical hunting and a word
should be said about long range shooting at game. Although riflescopes,
like the Vortex HS LR series, can make long distance shots much easier,
there are still many other variables, such as wind, affecting every shot. It is
important for hunters shooting at long distances to learn their personal
effective range, particularly in windy conditions, and to not shoot beyond
those distances at game. Please be responsible—the keys are knowing
your rifle, ammunition and your own abilities!
is part of the Marketing team at Optics Trade. She is a nature and astronomy enthusiast, that’s why you’ll find most of her articles in these two categories.