7N6M Ball (Modernized)
- Cartridge
- 5.45x39mm
- Bullet weight
- 3.43 g
- Reference velocity
- 880 m/s
- Muzzle energy
- 1328 J
Specification
The load, and the figures its drawing is made from
IdentityWho makes it, and what it is for.
- Designation
- 7N6M
- Maker
- Various
- Country of origin
- Soviet Union
- Introduced
- 1987
- Military load
- Yes
- Widely available
- Yes
ProjectileThe figures the drawing and the solver start from.
- Bullet type
- FMJ
- Cartridge
- 5.45x39mm
- Bullet diameter
- 5.6 mm
- Bullet weight
- 3.43 g (52.9 gr)
- Sectional density
- 0.151
- Ballistic coefficient (G1)
- 0.295
- Ballistic coefficient (G7)
- 0.168
- Reference velocity
- 880 m/s (2887 ft/s)
- Reference barrel
- 415 mm
- Velocity retention exponent
- 0.18
Ballistics
Downrange, solved
Solved at the reference barrel of 415 mm from the G1 coefficient and the load's velocity retention. A different barrel gives a different curve.
At the muzzle
What leaves the barrel
MuzzleThe solver’s figures at the reference barrel, where the curve starts.
- Muzzle energy
- 1328 J
- Effective range
- 522 m
- Momentum
- 3.02 kg m/s
- Taylor knockout factor
- 4.8
- Hatcher relative stopping power
- 34
- Energy density
- 5392.2 J/cm²
Downrange
Point by point
The same solution as the chart, at each distance the solver reports.
| Distance | Velocity | Energy | Drop | Time of flight | Mach |
|---|---|---|---|---|---|
| 0 m | 880 m/s | 1328 J | 0 cm | 0 s | 2.57 |
| 50 m | 869 m/s | 1295 J | 1.6 cm | 0.057 s | 2.53 |
| 100 m | 858 m/s | 1261 J | 6.5 cm | 0.115 s | 2.50 |
| 200 m | 835 m/s | 1196 J | 26.7 cm | 0.233 s | 2.43 |
| 300 m | 812 m/s | 1131 J | 61.7 cm | 0.355 s | 2.37 |
| 400 m | 789 m/s | 1067 J | 112.8 cm | 0.48 s | 2.30 |
| 500 m | 765 m/s | 1003 J | 181.6 cm | 0.608 s | 2.23 |
| 600 m | 740 m/s | 939 J | 269.5 cm | 0.741 s | 2.16 |
| 800 m | 689 m/s | 813 J | 511.6 cm | 1.021 s | 2.01 |
| 1000 m | 632 m/s | 686 J | 859.9 cm | 1.324 s | 1.84 |
API
The call that returns this record
The same fields, in the same units, from the same endpoint the page reads.
curl --request GET \ --url 'https://api.gunspec.io/v1/ammunition/7n6m' \ --header 'X-API-Key: your_key'