1. ZEROING THE SERVICE RIFLE

2. ELEMENTS OF ZEROING NOTE: The bullet will rise approximately
7 1/2 inches above the line of sight
between 0 and yards / meters.
AIMING
POINT
TRAJECTORY
LINE OF SIGHT
RANGE
100
200
300

3. TYPES OF ZEROS
ZERO
TRUE ZERO
BATTLE SIGHT ZERO (BZO)

4. RCO WINDAGE AND ELEVATION ADJUSTERS
RIFLE SIGHTING SYSTEM – • •

5. NUMBER OF CLICKS TO MOVE STRIKE OF BULLET ONE (1) INCH:
RCO WINDAGE AND
ELEVATION RULES
NUMBER OF CLICKS TO MOVE
STRIKE OF BULLET ONE (1) INCH:
RANGE
36 YARDS
9 CLICKS
100 YARDS/METERS
3 CLICKS
1 CLICK
300 YARDS/METERS

6. ELEVATION ADJUSTMENTS DIRECTION STRIKE OF ROUND IS MOVED
WINDAGE AND
ELEVATION ADJUSTMENTS
ADJUSTMENT
ADJUSTER DIRECTION
DIRECTION STRIKE OF ROUND IS MOVED
WINDAGE
CLOCKWISE
RIGHT
COUNTER-CLOCKWISE
LEFT
ELEVATION UP
DOWN

7. TARGET DIMENSIONS FOR KNOWN DISTANCE COURSE
4’ - 0”
6’ - 0”
6’ - 0”
60” 8”
6’ - 0” 4”
40”
19”
12”
26”
20”
14”
24”
40”
36” 6”
34”
“A” TARGET
“D” TARGET
“B” MODIFIED
TARGET

8. WEAPON’S ZERO TO CHANGE
FACTORS THAT CAUSE A
WEAPON’S ZERO TO CHANGE
Maintenance
Temperature
Climate
Ground Elevation
Uniform
CMC – 22R Chart 10

9. SUMMARY ELEMENTS OF ZEROING TYPES OF ZEROS RCO SIGHTING SYSTEM
WINDAGE AND ELEVATION RULES
TARGET DIMENSIONS
FACTORS AFFECTING ZERO
CMC.23 CHART # 5