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7N10 Improved Penetration

Drawing of the 7N10 Improved Penetration bullet
Cartridge
5.45x39mm
Bullet weight
3.62 g
Reference velocity
880 m/s
Muzzle energy
1402 J

Specification

The load, and the figures its drawing is made from

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IdentityWho makes it, and what it is for.

Designation
7N10
Maker
Various
Country of origin
Russia
Introduced
1992
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
3.62 g (55.9 gr)
Sectional density
0.159
Ballistic coefficient (G1)
0.3
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.

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0 m880 m/s

0225450675900522 m0501002003004005006008001000

At the muzzle

What leaves the barrel

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MuzzleThe solver’s figures at the reference barrel, where the curve starts.

Muzzle energy
1402 J
Effective range
522 m
Momentum
3.19 kg m/s
Taylor knockout factor
5.1
Hatcher relative stopping power
36
Energy density
5690.9 J/cm²

Downrange

Point by point

The same solution as the chart, at each distance the solver reports.

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DistanceVelocityEnergyDropTime of flightMach
0 m880 m/s1402 J0 cm0 s2.57
50 m869 m/s1366 J1.6 cm0.057 s2.53
100 m858 m/s1331 J6.5 cm0.115 s2.50
200 m835 m/s1262 J26.7 cm0.233 s2.43
300 m812 m/s1194 J61.7 cm0.355 s2.37
400 m789 m/s1126 J112.8 cm0.48 s2.30
500 m765 m/s1058 J181.6 cm0.608 s2.23
600 m740 m/s992 J269.5 cm0.741 s2.16
800 m689 m/s858 J511.6 cm1.021 s2.01
1000 m632 m/s724 J859.9 cm1.324 s1.84

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/7n10' \  --header 'X-API-Key: your_key'