Speer Lawman 230gr TMJ
- Cartridge
- .45 ACP
- Bullet weight
- 14.90 g
- Reference velocity
- 253 m/s
- Muzzle energy
- 477 J
Specification
The load, and the figures its drawing is made from
IdentityWho makes it, and what it is for.
- Designation
- 53653
- Maker
- Speer
- Country of origin
- United States
- Introduced
- 1995
- Military load
- No
- Widely available
- Yes
ProjectileThe figures the drawing and the solver start from.
- Bullet type
- TMJ
- Cartridge
- .45 ACP
- Bullet diameter
- 11.48 mm
- Bullet weight
- 14.9 g (229.9 gr)
- Sectional density
- 0.162
- Ballistic coefficient (G1)
- 0.19
- Reference velocity
- 253 m/s (830 ft/s)
- Reference barrel
- 127 mm
- Velocity retention exponent
- 0.27
Ballistics
Downrange, solved
Solved at the reference barrel of 127 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
- 477 J
- Effective range
- 149 m
- Momentum
- 3.77 kg m/s
- Taylor knockout factor
- 12.3
- Hatcher relative stopping power
- 50
- Energy density
- 464.7 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 | 253 m/s | 477 J | 0 cm | 0 s | 0.74 |
| 50 m | 240 m/s | 430 J | 20.2 cm | 0.203 s | 0.70 |
| 100 m | 228 m/s | 389 J | 85 cm | 0.416 s | 0.67 |
| 200 m | 207 m/s | 320 J | 376.9 cm | 0.877 s | 0.60 |
| 300 m | 189 m/s | 266 J | 937.3 cm | 1.382 s | 0.55 |
| 400 m | 172 m/s | 221 J | 1841 cm | 1.937 s | 0.50 |
| 500 m | 157 m/s | 183 J | 3181 cm | 2.547 s | 0.46 |
| 600 m | 142 m/s | 151 J | 5073.5 cm | 3.216 s | 0.42 |
| 800 m | 117 m/s | 102 J | 11139.3 cm | 4.766 s | 0.34 |
| 1000 m | 96 m/s | 68 J | 21726.1 cm | 6.655 s | 0.28 |
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/speer-lawman-230tmj' \ --header 'X-API-Key: your_key'