7N24 Super Armor Piercing
- Cartridge
- 5.45x39mm
- Bullet weight
- 4.15 g
- Reference velocity
- 840 m/s
- Muzzle energy
- 1464 J
Specification
The load, and the figures its drawing is made from
IdentityWho makes it, and what it is for.
- Designation
- 7N24 BS
- Maker
- Various
- Country of origin
- Russia
- Introduced
- 1999
- Military load
- Yes
- Widely available
- No
ProjectileThe figures the drawing and the solver start from.
- Bullet type
- AP
- Cartridge
- 5.45x39mm
- Bullet diameter
- 5.6 mm
- Bullet weight
- 4.15 g (64.0 gr)
- Sectional density
- 0.177
- Ballistic coefficient (G1)
- 0.323
- Reference velocity
- 840 m/s (2756 ft/s)
- Reference barrel
- 415 mm
- Velocity retention exponent
- 0.17
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
- 1464 J
- Effective range
- 457 m
- Momentum
- 3.49 kg m/s
- Taylor knockout factor
- 5.6
- Hatcher relative stopping power
- 37
- Energy density
- 5944.4 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 | 840 m/s | 1464 J | 0 cm | 0 s | 2.45 |
| 50 m | 814 m/s | 1375 J | 1.8 cm | 0.06 s | 2.37 |
| 100 m | 788 m/s | 1289 J | 7.4 cm | 0.123 s | 2.30 |
| 200 m | 737 m/s | 1127 J | 31.7 cm | 0.254 s | 2.15 |
| 300 m | 686 m/s | 978 J | 76.4 cm | 0.395 s | 2.00 |
| 400 m | 636 m/s | 840 J | 146.2 cm | 0.546 s | 1.86 |
| 500 m | 587 m/s | 714 J | 247 cm | 0.71 s | 1.71 |
| 600 m | 537 m/s | 599 J | 386.5 cm | 0.888 s | 1.57 |
| 800 m | 438 m/s | 399 J | 827.7 cm | 1.299 s | 1.28 |
| 1000 m | 338 m/s | 237 J | 1620.1 cm | 1.817 s | 0.99 |
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/7n24' \ --header 'X-API-Key: your_key'