20-mm High-Explosive Tracer (Self-Destroying) Projectile20-mm Tracer Projectile
Japanese Explosive Ordnance – Army Ammunition – Navy Ammunition
Chapter 5 - Section 1
NAVY PROJECTILES
20-mm Armor-Piercing Incendiary Projectile
Fuze: None.
Weight of projectile: 4.64 ounces.
Length of projectile: 3.15 inches.
Length of complete round: Mk I, 5.58 inches; Mk II, 6.76 inches.
Filling: Incendiary mixture:

1. Nitrocellulose: 77.5 percent.

2. Sodium nitrate: 11.3 percent.

3. Aluminum: 11.2 percent.

Weight of filling: 0.12 ounces.
Color and markings: White over-all.

Remarks: This projectile is unfuzed and has a pointed steel body and a soft copper cap soldered to the nose. The incendiary filling loaded through the base is sealed with a threaded base plug.

Upon impact, the rear end of the projectile ruptures and the heat generated ignites the incendiary filling.

No modification or similar Swiss ammunition exist.

Figure 354 – 20-mm Armor-Piercing Incendiary Projectile.

20-mm High-Explosive Tracer (Self-Destroying) Projectile20-mm Tracer Projectile