Navy Projectiles: Part 1
7.7mm Aircraft Machine Gun Ammunition
Ball AP Incendiary Tracer H.E.
Overall Length: 3.03 in 3.01 in 3.04 in 3.04 in 3 in
Length of case: 2.21 in 2.21 in 2.21 in 2.21 in 2.21 in
Length of projectile: 1.28 in 1.59 in 1.53 in 1.40 in 1.32 in
Weight of projectile: 173.6 g 133.2 g 130.4 g
Type --- Projectile Jacket --- Projectile Core
Ball --- CuNi --- Lead
AP --- Brass --- Steel
Tracer --- CuNi --- Lead
Incendiary --- Brass --- W.P. and Lead
H.E. (Blunt Nose) --- Copper --- PETN and Lead
Used by the following weapons
Type 92 A.A.M.G. (Lewis Design)
Type 92 flexible A.C.M.G. (Lewis Design)
Type 97 fixed A.C.M.G. (Vickers Design)
Type --- Primer Color
Ball --- Black
AP --- White
Tracer --- Red
Incendiary --- Green
H.E. --- Purple
Remarks
This ammunition is used in Navy aircraft. There is no sequence of loading.
All the rounds are rimmed. They are interchangeable with British caliber 303.
The Type 92 AAMG and ACMG use a drum magazine, and the Type 97 uses a link belt feed.
13mm Aircraft Machine Gun Ammunition
Tracer A.E.T. Incendiary
Overall Length: 4.12 in 4.12 in 4.12 in
Length of case: 2.5 in 2.5 in 2.5 in
Length of projectile (w/o fuze): 1.57 in 1.57 in 1.57 in
Weight of projectile (empty): 27.2 g 24.6 g 24.3 g
Type --- Projectile Jacket --- Projectile Core
Ball --- Copper --- Lead
APT --- Copper --- Steel
Tracer (Dummy fuze plug) --- Copper --- Lead
Incendiary --- Copper --- W.P. and Lead
H.E.T. (Fuzed) --- Copper --- PETN and Lead
H.E. (Fuzed) --- Copper --- PETN and Lead
Used by the following weapons
Type 2 A.C.M.G. (Copy of German 13mm Rheinmetall-Borsig)
Type --- Body Color
Ball --- Black
A.P.T --- White
Tracer --- Red
Incendiary --- Yellow
H.E.T. --- Red (with brown band)
H.E. --- Maroon (rust)
Remarks
This ammunition has a reduced-rim brass case with a shoulder above the extractor groove.
All rounds have a nose fuze or a dummy fuze plug.
The body of the projectiles are paitned in distinctive colors after the system used in 20mm aircraft cannon ammunition.
13.2mm Aircraft Machine Gun Ammunition
Tracer A.P. H.E.I.
Overall Length: 5.37 in 5.37 in 5.37 in
Length of case: 3.87 in 3.87 in 3.87 in
Weight of projectile (empty): 44.8 g 51.8 g 44.3 g
Type --- Projectile Jacket --- Projectile Core
Ball --- Copper --- Lead
Tracer --- Copper --- Lead
AP --- Copper --- Steel
H.E.I. --- Copper --- PETN and Incendiary Composition
Used by the following weapons
Type 93 AAMG
Type 3 Fixed/Flexible ACMG
Type --- Color Around Primer
Ball --- Black
Tracer --- Red
A.P. --- White
H.E.I. --- Yellow
H.E. --- Maroon (rust)
Remarks
This ammunition has a rimless brass case. It is very similar in appearance but not interchangeable with U.S. cal .50.
The standard Navy code for marking small arms ammunition is used.
Next Time: 20mm Projectiles
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