Picture of Type 2 13mm (MG131 license version adopted by Japanese production) ammo with all bullet types. Type 2 entered production in the late 1944 and was used as turret MG on several Japanese aircrafts like D4Y3a, M6A1, P1Y and etc
It should be noted that the labels are direct translations of the Japanese names for these projectiles. The Navy did not use the alphanumeric designations, like employed by the Army (such as Ma-103 or Ma-204); so their naming convention is extremely simple: ammunition type followed by the modification (HE; Tracer; etc) / model number (Modification 1; Model 2; etc).
Tracer HE cartridge modif. 2:
Source: Picture was taken and translated from book 鈴鹿の記憶 ―戦中・戦後の証言と資料―
It should be noted that the labels are direct translations of the Japanese names for these projectiles. The Navy did not use the alphanumeric designations, like employed by the Army (such as Ma-103 or Ma-204); so their naming convention is extremely simple: ammunition type followed by the modification (HE; Tracer; etc) / model number (Modification 1; Model 2; etc).
Tracer HE cartridge modif. 2:
- Bullet mass: 35,1g
- HE filling mass: 0,9g
- HE filling type: Pentolite
- Tracer filling mass: 0,6g
- Tracer work time: 4,5s
- Tracer color: Yellow
- Bullet mass: 34,8g
- Incendiary filling mass: 1,2g
- Incendiary filling type: White Phosphorus
- Bullet mass: ?
- Incendiary filling mass: ?
- Incendiary filling type: ? (Probably Al-Mg + Ba(NO3)2 as on similar Incendiary cartridge model 2 used on Type 99 20mm)
- Bullet mass: 38g
- Tracer filling mass: 1g
- Tracer work time: ?
- Tracer color: Yellow
- Bullet mass: 34g
- Tracer filling mass: 0,6g
- Tracer work time: 4,5s
- Tracer color: Yellow
- Bullet mass: 34g
- Bullet mass: 35g
- HE filling mass: 1,7g
- HE filling type: Pentolite
Source: Picture was taken and translated from book 鈴鹿の記憶 ―戦中・戦後の証言と資料―