40-mm Armor-Piercing Projectile40-mm Tracer Projectile
Japanese Explosive Ordnance – Army Ammunition – Navy Ammunition
Chapter 5 - Section 1
NAVY PROJECTILES
40-mm High-Explosive Antiaircraft Projectile
Weight of complete round (without fuze): 1.18 kg. (2.50 pounds).
Weight of projectile, filled (without fuze): 0.79 kg. (1.74 pounds).
Weight of filling of projectile: 0.07 kg.
Filling: Cast TNT.
Diameter at bourrelet: 1.57 inches.
Length of projectile (without fuze): 5.01 inches.
Length of assembled round (without fuze): 10.40 inches.
Length of propellant case: 6.18 inches.
Width of rotating band: 0.63 inch.
Diameter of base of propellant case: 1.89 inches.
Fuzing: A.A. powder time fuze.
Propellant: Cylindrical lengths of smokeless powder, 95.9 grams.
Color and markings: Maroon with 12-mm green band around ogive.

Remarks: This round was evidently designed only for antiaircraft work, having no impact or tracer element. It is used in the Navy's Vickers-Armstrong guns, which are belt-fed with automatic fuze cutters attached.

Figure 370 – 40-mm High-Explosive Antiaircraft Projectile.

40-mm Armor-Piercing Projectile40-mm Tracer Projectile