User guide

ManualsBrandsRCBS ManualsEquipmentAmmoMaster Chronograph

AmmoMaster

Chronograph

Operating Instructions

All of us at RCBS

would like to thank you for purchasing the

AmmoMaster

Chronograph. We believe, dollar for dollar, it is the best

chronograph on the market.

THOROUGHLY READ ALL DIRECTIONS AND SAFETY INSTRUCTIONS

INCLUDED IN THIS PACKAGE.

If you have any questions or problems, do not return it to the

store. Instead, call us at (800) 533-5000 or (530) 533-5191 and

we will be happy to help you.

FEATURES

• 86 square inches of available shooting area.

• Detachable Display Unit with 20 foot cord.

• High, Low and Average data-string velocity readings.

• Extreme Spread and Standard Deviation data-string calculations.

• Edit data-string functions and delete data functions.

• Feet/second (f/s) or meter/second (m/s) velocity readings.

• Low battery indicator

• Full string indication

• 10 strings maximum stored in memory with 10 shot velocity

measurements per string

• Warranty of 1 year from date of purchase.

SPECIFICATIONS

Velocity Range: 70 – 7000 fps (21 – 2134 m/s)

Clock speed: 10 MHz

Power Requirements: 9 Volt DC battery

Operating Temperature Range: 20 – 120º F

SAFETY AND WARNINGS

READ THOROUGHLY ALL DIRECTIONS AND SAFETY

INSTRUCTIONS INCLUDED IN THIS PACKAGE. FAILURE TO COMPLY

MAY RESULT IN AN UNSAFE FIREARM CONDITION THAT MAY CAUSE

PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

WARNING!

• TARGET MUST HAVE A SAFE BACKSTOP.

• BYSTANDERS MUST STAY BEHIND THE SHOOTERS AT ALL TIMES.

• ALWAYS WEAR EYE AND HEARING PROTECTION. Shooter must

maintain proper eye relief from optical sighting devices and wear

eye protection at all times.

• FOLLOW LOCAL, STATE AND FEDERAL LAWS REGARDING

FIREARM USE.

ALWAYS FOLLOW THE RULES OF FIREARM SAFETY.

UNLOAD FIREARM, OPEN FIREARM ACTION AND ENGAGE FIREARM

SAFETY BEFORE MAKING ANY FIREARM ADJUSTMENTS. DO NOT

REACH IN FRONT OF FIREARM MUZZLE TO MAKE ADJUSTMENTS.

ALWAYS KEEP FIREARM MUZZLE POINTED IN A SAFE DIRECTION

WHEN MAKING ADJUSTMENTS, LOADING FIREARM AND

DISCHARGING FIREARM. CARE SHOULD BE TAKEN TO ENSURE

THAT THERE IS NOT INTERFERENCE WITH THE FIREARM STOCK,

SLING OR ACTION.

WARNING! Never exceed published recommended gun

powder amounts in reloads to achieve higher velocities in your

ammunition. Increasing the amount of powder could cause a

dangerous condition that may cause property damage, personal

injury or death.

WARNING! Velocity measurements should not be used to

calculate combustion pressures in your cartridge or chamber. Again, do

not exceed published maximum powder levels in your ammunition.

WARNING! Do NOT try to protect your chronograph with armor

plating. Bullet ricochet from hitting this plating could cause property

damage, personal injury or death. Chronograph components are

replaceable.

All chronograph units have inherent uncertainty when recording

velocity measurements. Several uncontrollable variables can affect

each measurement and contribute to this uncertainty, including sunlight

intensity, sunlight orientation, cloud cover, wind, shadows, and ground

reﬂectivity of cement, water, or snow, etc. When collecting data, be

suspicious of any data points that have greater than a 4% difference of

that ammo’s average string velocity.

Special care should be taken when shooting certain types of

ammunition. Gas checks, wads, sabots, etc. can separate and impact

your chronograph causing damage to the device.

Also, as with any electronic device, water can damage certain

components. Be careful when using the chronograph outdoors in rainy

weather to prevent damage to the Keypad/Display Unit or Skyscreens.

ITEM NO. PART NUMBER DESCRIPTION QTY.

1 Body 1

2 Keypad/Display Unit 1

3 Keypad/Display Unit Cover 1

4 Body Lid 1

5 81191 Side Support (set of 2) 2

6 81192 Diffuser (3 part assembly) 2

7 81193 Skyscreens 2

Figure 1 - RCBS

AmmoMaster

Chronograph

RCBS AmmoMaster

Chronograph Instructions 1

Summary of content (8 pages)

PAGE 1
AmmoMaster® Chronograph Operating Instructions All of us at RCBS® would like to thank you for purchasing the AmmoMaster® Chronograph. We believe, dollar for dollar, it is the best chronograph on the market. Thoroughly read all directions and safety instructions included in this package. If you have any questions or problems, do not return it to the store. Instead, call us at (800) 533-5000 or (530) 533-5191 and we will be happy to help you.
PAGE 2
UNPACKING 1. D etach the Keypad/Display Unit from the chronograph’s body by depressing the locking tab on top of the unit and pulling straight off. Try not to twist or bend Display Unit while performing this action. The display will be kept near the shooter during use. 2. The AmmoMaster® Chronograph has an internal storage compartment. The base or ‘headstamp’ end of the chronograph has a removable door. Depress the tab to remove the door (See Figure 2). Figure 4 Figure 2 - Storage Compartment 3.
PAGE 3
6. Insert the Diffuser’s tab into the Support Arm’s slot so the ribs on the Diffuser are facing down toward the Skyscreen as shown in Figure 8. While holding the Diffuser horizontal, install the other Support Arm onto the opposite side of this Diffuser and then connect this Support Arm to the Skyscreen the same way you did in Step #4. Figure 6 5. The next step is to assemble the Diffusers. Each Diffuser consists of one middle piece and two end pieces.
PAGE 4
STORAGE Follow steps 1 – 7 of the “Assembly” section in reverse sequence. Your Chronograph should be stored in a dry, cool place away from direct sunlight if possible. Although the plastic components of your unit are manufactured with a UV inhibitor additive, limiting unnecessary UV exposure of any plastic device is recommended. Do not leave your unit outside for long periods of time. KEYPAD LAYOUT Figure 10 - Initialization Screen 4.
PAGE 5
m/s – f/s Statistical Data Switches units from feet per second or meters per second. To switch between units simply depress the m/s – f/s button. Depress “Stats” button and the highest velocity reading within string will be displayed. Use “Scroll” button to scroll right to view the lowest velocity reading, average velocity, extreme spread and the standard deviation of all shots recorded within the current shot string.
PAGE 6
Figure 13 - “Ready” on “Shot” 1 2. While recording shot velocities, the most recent velocity measurement can easily be deleted by pressing the “Delete Data” button. The word “del” will show on the display (see Figure 14). Depressing the “Yes” button will confirm the deletion of the last recorded velocity. Depressing the “No” button will prevent deletion of velocity and resume recording shot velocities within the existing string. Figure 14 - Delete Current Velocity Data Point 3.
PAGE 7
recorded velocities (see Figure 16). Depressing “Enter” again, or the “Add Data” button, the display will flash between “String” 4 and “Ready” on “Shot” 1. Now the unit is ready to record shot 1 in string 4. alleviate the problem. Another technique is to color the bullet with a black marker, especially if the bullets have a shiny appearance. In locations with direct overhead sunlight, the Skyscreen may become saturated by the incoming light, even when the Diffusers are installed.
PAGE 8
Average Velocity Displays the statistical average of the recorded velocities within an existing shot string. Extreme Spread Displays the difference between the highest and lowest velocity readings. Standard Deviation Standard deviation (S.D.) of a string is a measure of uniformity of the data. It essentially tells you how much scatter is present in the data set relative to the average velocity. The smaller the number is, the better your data’s uniformity.