Type 99 (Rimless) 7.7-mm Ammunition7.92-mm Aircraft Machine Gun Ammunition
Japanese Explosive Ordnance – Army Ammunition – Navy Ammunition
Chapter 4 – Section 1
ARMY PROJECTILES
Type 92 (Semi-rimmed) - 7.7-mm Ammunition
Ball
A.P.
Tracer
Incendiary
H.E.
Over-all length
inch
3 9/64
3 9/64
3 9/64
3 9/64
3 5/64
Length of case
inch
2 1/4
2 1/4
2 1/4
2 1/4
2 1/4
Lenght of projectile
inch
1 25/64
1 29/64
1 1/2
1 1/2
1 1/2
Weight of projectile
grams
203
162
155
162
162
Construction:

Type

Projectile Jacket

Projectile Core

Ball

CuNi

Lead.

Tracer

CuNi

Lead.

A.P.

CuNi

Hard steel.

Incendiary

CuNi

W.P. and lead.

H.E.

CuNi

P.E.T.N. and lead.

Weapons in which used:

Type 89 Flexible A.C.M.G.

Type 89 Felxible A.C.M.G. (special).

Type 89 Fixed A.C.M.G.

Type 92 H.M.G.

Color and markings:
Type Bands
Ball Pink.
Tracer Green.
A.P. Black.
Incendiary Magenta.
H.E. Purple.

Remarks: The type 92 heavy machine gun uses feed strips of 30 rounds. When used for aircraft flexible machine gun, this ammunition is packed in 5-round clips in a manner cor-responding to the packing of rimless, rifle ammunition, but the clip is of larger size to ac-commodate the larger bore of the semirimmed type.

The P.E.T.N. in the H.E. round is set off by the heat of impact.

Figure 203 – Type 92 (Semirimmed) 7.7-mm Ammunition.

Type 99 (Rimless) 7.7-mm Ammunition7.92-mm Aircraft Machine Gun Ammunition