The Japanese Army had two color systems for marking ammunition. The Old and New systems differed in the number of color bands they used, the New system had the body of the projectile colored to indicate the group in which the type of ammunition was categorized and the color bands determined specific properties.
Old Color System
Notes:
Common Explosive Types
Japanese characters giving the type number of the projectile (painted on projectile) and type number of the gun (painted on the case) appear only when there is a chance of confusion with similar projectiles or cases.
Chemical (Gas or Liquid Filled) Projectiles
Notes:
Special-Purpose Projectiles
Projectiles designed for special purposes are painted black over all and are identified by a special symbol stenciled near the middle of the body. A list is provided in the New Color System .
Weight Variation Marking
The variation of individual projectiles from standard weight is important in the ballistics problem and can be corrected for insetting sights. The variation is therefore indicated by plus/minus signs painted on the projectiles
OVERWEIGHT
- 1.5 to 2.5 percent overweight ++
- 0.5 to 1.5 percent overweight +
STANDARD WEIGHT
- 0.5 percent plus or minus ±
UNDERWEIGHT
- 0.5 to 1.5 percent underweight -
- 1.5 to 2.5 percent underweight - -
New Color System
Notes:
Common Explosive Types
Hollow charge ammunition is distinguished from other types in the H.E. high grade steel (yellow band) group by the presence of the symbol.
Chemical (Gas or Liquid Filled) Projectiles
Notes:
Special-Purpose Projectiles
Projectiles designed for special as listed below are identified by the overall body color and by a special symbol stenciled near the middle of the body.
Projectile Color of Body
Smoke* White
Incendiary^ Yellow
Illuminating Red
Target Black
Sand-filled Black
*: Signal or Screening
^: Non-liquid
^: Non-liquid
Next Time: Rifle Caliber Ammo
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