PRECISIONEERED®RELOADING EQUIPMENT
We think that we make the very best reloading equipment in the world.
If you agree, please tell your friends. If you disagree, tell us –we want to do something about it!
RangeMaster 750 Scale
1-800-533-5000 (US or Canada) or 530-533-5191
Customer Service
Hours: Monday –Friday, 6:30am –4:00pm Pacific Time
e-mail: rcbstech@atk.com
Web site: http://www.rcbs.com
RCBS 605 Oro Dam Blvd. Oroville, CA95965
PRODUCT INSTRUCTIONS
IMPORTANT SAFETY INFORMATION
IMPORTANT: PLEASE READ ALLINFORMATION FIRST
Like any scale, you control the accuracy of your RCBS RangeMaster Scale. Before using the
scale, read this instruction manual carefully to fully learn how to safely operate the scale. Failure
to properly operate the scale can result in severe personal injury and/or equipment damage.
If you have read these instructions and still do not understand some operation, call us at 1-800-
533-5000 and a technician will assist you. This instruction manual contains specific safety and
operating information. It should be considered a permanent part of your reloading equipment and
remain with the equipment at all times for easy reference.
SAFETY
Reloading is an enjoyable and rewarding hobby that can be conducted safely. However, as with
any hobby, carelessness or negligence can make reloading hazardous. This product has been
designed from the beginning with the user’s safety in mind. When reloading, safety rules must be
followed. By observing these rules, the chance of a hazardous occurrence causing personal injury
or property damage is minimized.
GENERAL
Use all equipment as the manufacturer recommends. Studytheinstructionscarefully and
become thoroughly familiar with the operation of the product. If you do not have written
instructions, request a copy from the equipment manufacturer.
Do not take short cuts. Attempting to bypass established procedures is an invitation to an
accident.
Keep tools and components neat, clean and orderly. Promptly and completely clean all primer
and powder spills.
Reload only when you can give your undivided attention. Do not reload when fatigued or ill, or
under the influence of medications or alcohol. Develop a reloading routine to avoid mistakes
which may prove hazardous. Don’trush –load at a leisurely pace.
Always wear adequate eye protection to protect your eyes from flying particles. Youassume
unnecessary risk when reloading without wearing safety glasses.
PRIMERS AND POWDER
Store primers and powder beyond the reach of children and away from heat, dampness, open
flames and electrical equipment. Avoid areas where static electricity is evident.
Do not use primers of unknown identity. Discard unknown primers in accordance with
applicable regulations.
Keep primers in the original factory container until ready to use. Return unused primers to the
same factory packaging for safety and to preserve their identity and shelf life. Primer
packaging is designed to provide safe storage.
DO NOT store primers in bulk. The blast of just a few hundred primers is sufficient to cause
serious injury to anyone nearby.
DO NOT force primers. Use care in handling primers.
DO NOT have more than one can of powder on the bench at one time. Powder cans should
be stored away from the bench to avoid picking up the wrong one.
DO NOT use any powder unless its identity is positively known. The only positive identification
is the manufacturer’s label on the original canister. Discard all mixed powders and those of
uncertain identity.
DO NOT store powder in the unit after a reloading session. Over time the powder will corrode
the powder hopper.
If you use a powder measure, replace the lids on both the powder hopper and powder can
after the powder hopper has been filled.
When using a powder measure, settle the powder in the powder hopper before charging any
cases. Throw and check the weight of at least ten charges. This will assure you that the
correct powder charge is being thrown.
LOADING DATA
DO NOT SMOKE WHILE RELOADING
OBSERVEALL WARNINGS ABOUTTHE USE OF MAXIMUM LISTED LOADS.
Use only laboratory tested reloading data. We recommend the SPEER Reloading Manual.
WARNING
This digital scale is for use with smokeless powders only. Do not use with black powder (used in
muzzle loading firearms). If black powder should come in contact with an electrical spark, an
explosion may occur, resulting in serious injury or death.
CALIBRATION
Check calibration prior to each use of the scale and re-check frequently during use with the
calibration weights provided. Aspotcheckcan easily be made during operation with an RCBS
Scale Check Weight Set. If accuracy is found to be out of tolerance, the scale must be recalibrated
as explained in the CALIBRATIONsectionofthis instructionmanual. A scale with improper
calibration will cause an incorrect charge weight which may exceed the maximum recommended
load.
This instrument must be serviced only be a trained, qualified factory technician to insure warranty
and safety. For repair information, call: 1-800-533-5000
PRECAUTIONS
Digital scales are very reliable devices. However,herearesomeevents which may result in an
inaccurate reading:
Change in temperature. If the temperaturechangesmorethan a few degrees, you must re-
calibrate the scale. Allow scale to stabilize for 20-30 minutes prior to use.
Changes in scale location or an un-level working surface.
Un-centered weights on the platen.
Jarring of the scale during operation.
Use only the two calibration weights supplied for accuracy.
Weight accuracy is crucial. Keep weights clean and carefully stored. If dropped or damaged,
have weights inspected against known standards. Contact RCBS Customer Service.
Static electricity can causethe scale to “jump around”. If static build-up is evident, wipe scale
with an anti-static sheet, or use anti-static spray. Spray on clean soft cloth first. Do not allow
spray to get into mechanism.
If powder should get inside the unit, stop operation immediately and do not use scale until it
has been serviced. Contact RCBS Customer Service.
RECORD KEEPING
Keep complete records of reloads. Apply a descriptive label to each box showing the date
produced, and the primer, powder and bullet used. Labels for this purpose are packed with
SPEER bullets. Never attempt to guess at the identity of your ammunition.
NOTE: The scale was shipped in protective packaging. Save and use for transporting or long-term
storage of the unit. This instrument may only be serviced by a certified technician. See back cover
for address and Too-Free Customer Service phone number.
GENERAL INFORMATION
Handloaders know quality reloads begin with
RCBS products and one of the most important
pieces of equipment is the RCBS
RangeMaster 750 Digital Scale. With features
like a 750-grain capacity,clearandeasyto
read display that reads in grains or grams,
quick repeatability and an easy re-zero feature,
the RCBS RangeMaster is the perfect choice
for serious shooters that demand the best.
If the scale has been sitting at a cool
temperature, remove it from the carton and
allow it to sit at room temperature for about 20
to 30 minutes before using.
Carefully unpack the scale. Look for and
identify the following items:
Scale with platen
AC Power adaptor
One 20 gram weight and one 30
gram weight
Powder pan
Under the scale is the cover for the
battery (not supplied)
Instruction Manual
Warranty Card
The scale was shipped in protective
packaging which should be saved and used
for transporting the scale. This packaging is
also recommended for long term storage of
the unit.
POWER SUPPLY (ADAPTOR):
(1) Input: 120 VAC 60 Hz
Output : 9V DC 100 mA
(2) Input : 230 VAC 50 Hz
Output : 9V DC 100 mA
POWER SUPPLY (ADAPTOR):
9V DC batteries
POWER CONSUMPTION:
Average current consumption in use: DC 15
mA
Average current consumption in standby: DC
10μA
Notice: When the low-power indication
appears on the screen, the batteries
need to be replaced.
SPECIFICATION:
750.0 GN / 0.1 GN
50.00 g / 0.01 g
IMPORTANT:
Treat the scale as you would any fine
instrument. The RangeMaster 750 is
physically very fragile and the load cell can be
damaged by the following:
Pushing down or dropping the scale.
Pulling up on the platen in such a
way that it binds in the load cell.
A sudden, violent physical shock to
the scale.
SCALE - KEYPAD
FUNCTION DESCRIPTION
GN/GMS ZERO CAL ON/OFF
GN/GMS: This is the key to change the
scale from grains to grams. The
scale defaults to grains GN.
When in the grams mode it will
show 0.00 and a lower case g will
be in the upper right hand corner.
When the scale is in grains mode,
it will show 0.0 and there will be
an upper case GN along side of
the 0.0
ZERO: This is the key that will re-zero your
scale and remove the weight of the
pan from the platen. To tare the
weight of the pan from the scale,
place the pan on the platen and
press Zero. This will remove the
weight of the pan. When you
remove the pan it will show a
negative number. When the pan is
placed back on the scale it will show
0.0 GN and you are ready to weigh.
CAL: This is your calibration key. You
should calibrate your scale each time
you begin a new reloading session.
See the calibration section to calibrate
your scale.
ON/OFF: Power on / Power off
SET UP
YourScaleispowered by a 9 Volt DC
transformer or you can use a 9 volt battery
(not supplied with the scale). Choose a
quality 9 volt battery or use the transformer
supplied with the scale.
CALIBRATION
Always calibrate your scale before use. This
must be done WITHOUT the powder pan on
the platform. To calibratethescale, follow the
steps below:
Step 1. Be sure the powder pan has been
removed from the platen and then
press the ON key. When you turn
the scale on, the display will show
88888 across the display for a few
seconds and then displays 0.0 GN
(grains mode). The arrow will be
pointing to “stable” when ready to
proceed with calibrating. SEE
PICTURE #1
Step 2. Next press the CAL key on the
scale. The display will read C 0
with a lower case g n the upper right
hand corner of the display. When
the display shows C 0 press the
CAL key again. SEE PICTURE #2
Step 3. When the display shows C 20 place
the 20 gram weight on the platen
(the smaller of the two) and press
the CAL key. SEE PICTURE #3
Step 4. When the display shows C 50, add
the 30 gram weight to the platen
and press the CAL key. SEE
PICTURE #4
Step 5. Now the display will show 50.00 g.
SEE PICTURE #5. Remove both
weights from the platen and replace
them to their holders. The display
will automatically switch to 0.0 GN
(grains)
Step 6. Next place the powder pan on the
platen and press the ZERO key to
zero the weight of the pan. The
display will now show 0.0 GN and is
now calibrated and ready to operate.
AUTO POWER OFF FUNCTION:
1.This function is only works when the battery
power is used. With no weight on powder
pan and without pressing any key for 5
minutes, the scale will automatically shut
down.
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