Leupold RX-IV BC Owner's Manual

RX™-IV

Boone and Crockett™

Edition

Rangefinder

OPERATING INSTRUCTIONS

Introduction

Congratulations! You have purchased a Leupold® RX™-IV Boone and
Crockett™ Edition digital laser rangefinder that has been designed
by Leupold’s engineers and designers to be the best rangefinder on
the market and to provide you with years of solid performance in
the field. Following are detailed instructions regarding the proper
use and employment of your RX-IV Boone and Crockett Edition
rangefinder. To ensure top performance for the life of the product,
please read these instructions before operating your rangefinder.

Your new Leupold RX-IV Boone and Crockett Edition digital laser
rangefinder is a revolutionary range-finding device that incorporates
advanced digital electronics with state-of-the-art ballistics algorithms.
True Ballistic Range™ algorithms were developed by the same
engineers who developed Sierra Infinity® Exterior Ballistics Software
and who helped develop navigation and guidance systems for ICBMs
and other missiles with far more demanding trajectory requirements
than a hunting bullet. RX-IV Boone and Crockett Edition features
include an inclinometer, but the truly innovative and unique features
are True Ballistic Range (TBR™) and Trophy Scale™.

True Ballistic Range (TBR) is a marriage of laser ranging, inclinometer
and an advanced computerized ballistics program. The result is
distance measuring precise within a yard, no matter the angle at
which the laser is fired. Bullets and arrows travel in a ballistic arc,
yet conventional rangefinders only provide a linear distance to
your target. True Ballistic Range delivers the ballistic equivalent
range to the target, accounting for the effects of inclines (either
up or down) on the path of your bullet or arrow. Other features
that are provided for firearms are outputs that display either
MOA adjustments or inches/centimeters of holdover at that
specific distance. True Ballistic Range eliminates any potentially

significant error, and provides a precise range for your aiming
calculations. TBR is matched to each of seven firearm ballistics
groups and three archery ballistics groups, allowing use with most
popular firearms and bows. RX-IV Boone and Crockett Edition
rangefinders add the ability to accurately judge the width and
height of a target using Trophy Scale (see page 3) as well as
showing the exact aim point to be used with your Boone and
Crockett Big Game reticle (see page 7).

The ranging accuracy of all Leupold RX Series rangefinders is
+/- one yard/meter. The maximum range of the unit depends on
the reflectivity of the target (as do all rangefinders). Following
is a reference table listing the ranges of the various models under
different conditions:

MAXIMUM RANGE

CONDITION RX-I RX-II RX-III RX-IV

Reflective
Target (yd/m)

Trees (yd/m) 600/ 549 600/ 549 700/640 800/ 732 800/ 732

Deer (yd/m)

,

750/ 686 750/ 686 1,200/ 1,097 1,500/ 1,372 1,500/ 1,372

500/ 457 500/ 457 600/549 700/ 640 700/ 640

Surface texture, color, size, and shape of the target all affect
reflectivity, which in turn affects the maximum range of the
instrument. As a rule of thumb, brightly colored targets are much
more reflective than darker targets. Tan game coats are more
reflective (and thus provide a more solid reading) than a black
roof. A shiny surface is more reflective than a dull surface. Smaller
targets are more difficult to range than larger targets. Light
conditions, haze, fog, rain, and other environmental conditions
can all affect ranging performance. Any factor which degrades air
clarity will reduce the maximum effective range.

RX-IV Boone and

Crockett Edition

Specifications

The RX Series of digital laser rangefinders provides a variety of useful modes to tailor performance to the conditions you experience in the
field. Model features are identified on the following pages.

Magnification 6× 6× 8× 8× 8×
Inclinometer No Yes Yes Yes Yes
TBR (True Ballistic Range) No Yes Yes Yes Yes
Match 13™ Reticle System
Trophy Scale No No No No Yes
Quick Set Rotary Menu
Long Range Mode Yes Yes Yes Yes Yes
Rain Mode No Yes Yes Yes Yes
1st Target Mode No Yes Yes Yes Yes
Last Target Mode No Yes Yes Yes Yes
Line of Sight Distance (LOS) Yes Yes Yes Yes Yes
Compass With Tilt Compensation No N o No Yes No
Thermometer ºC to ºF Yes Yes Yes Yes N o
Yards/Feet/Meters Mode Yes Yes Yes Yes Yes
Scan Mode Yes Yes Yes Yes Yes
Illuminated Display No No Yes Yes Yes
Clear Field™ Display Cleanup Mode Yes Yes Yes Yes Yes
Battery Life 20 00 Actuatio ns 2000 Ac tuations 2000 Ac tuations 2000 Ac tuations 2000 Act uations
Weight 6.8 oz / 193 g 6.8 oz / 193 g 12 oz / 340 g 12 oz / 3 40 g 12 oz / 340 g
Dimension (Inches) 4" × 2.75" × 1.5" 4" × 2.75" × 1.5" 4.7" × 3.5" × 2" 4.7" × 3.5" × 2" 4.7" × 3.5" × 2"
Dimension (Centimeters) 10 × 7 × 3.8 10 × 7 × 3.8 12 × 8.8 × 5 12 × 8.8 × 5 12 × 8.8 × 5
Low Battery Indicator Yes Yes Yes Yes Yes
Warranty 1 Year 1 Year 2 Years 2 Year s 2 Years
Weatherproof /Waterproof We atherproof Weather proof Waterproof Waterp roof Waterp roof

* RX-IV Boone and Crockett Edition comes with Boone and Crockett™, Crosshair, and Plus Point™.

™

™

RX-I RX-II RX-III RX-IV RX-IV Boone and Crockett Edition

Yes Yes Yes Yes No*

Yes Yes Yes Yes Yes

1

Operation

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.

-/+

RX

-I

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.

QUICK SET ROTARY MENU

™

*Display shown with all possible modes visible

QUICK START MODE

Leupold RX-IV Boone and Crockett™ Edition
rangefinders are shipped in the Quick Start
Mode, limiting the available options to
those most commonly used. Each of the
three TBR™ rifle settings is available
(page 4), as well as each ballistics group
(bow – page 5, rifle – page 6), and Trophy Scale.
All returns will be measured in yards; to access all other
modes the Advanced Mode must be activated.

To activate Advanced Mode, press and hold all buttons for 10
seconds; you will see a numeric count-down displayed. Once the
display has reached ”0”, every icon will be displayed, indicating
Advanced Mode has been activated. To return to Quick Start
Mode, simply press and hold all buttons again for 10 seconds; you
will see the same numeric count-down displayed. Once the display
has reached “0”, only those icons available in Quick Start Mode
will be displayed, indicating Quick Start Mode has been activated.

RX™-IV BOONE AND CROCKETT™ EDITION

SET

MODE
POWER

When you initially push the POWER button, the unit is ready for
scanning. When you first press and hold the MODE button for 1
second, the Quick Set Rotary Menu™ is prepared for navigation in
the Quick Start Mode. To access Advanced Mode, all buttons must
be held simultaneously for 10 seconds. To set or activate a mode,
you must advance to that function by pressing the MODE button
until that function is flashing. To activate a mode, press the
SET button, the icon will display steadily and the word “ON”
will appear in the bottom right portion of the display. If this is
the last mode to be set, allowing the rangefinder to sit idle for
20 seconds will cause an automatic power-off, saving all selections.
If additional modes require activation/deactivation, simply press
MODE to continue around the Quick Set Rotary Menu. Pressing
and holding MODE for 1 second at any time will exit the Quick
Set Rotary Menu, save all previous changes, and prepare the
rangefinder for immediate use.

NOTE: Activating certain modes automatically disables other

modes. For example, 1st Target and Last Target Mode work to
achieve opposite goals; activating one will automatically deactivate
the other. Long Range and Rain Mode can be on at the same time.

FUNCTION 1: LONG RANGE MODE

This mode is used when you want the
rangefinder to range only those items
beyond 150 yards (137 meters). If
you are ranging targets closer than
150 yards (137 meters), turn the
Long Range Mode off. This mode
automatically limits returns to targets of
distances greater than 150 yards (137 meters). When ranging
targets closer than 150 yards (137 meters), this mode will need
to be deactivated before a return will be displayed.

FUNCTION 2: RAIN MODE

The Rain Mode is used in rainy/foggy
conditions and screens out false
returns from raindrops or other
atmospheric interference to provide
an accurate range.

Focus

The RX-IV Boone and Crockett Edition digital laser rangefinders
have three buttons: POWER, MODE, and SET. To toggle between
Quick Start Mode and Advanced Mode, press and hold all buttons
for 10 seconds.

Battery

2