Underwood 200gr Hornady XTP
- Cartridge
- 10mm Auto
- Bullet weight
- 12.96 g
- Reference velocity
- 366 m/s
- Muzzle energy
- 868 J
Specification
The load, and the figures its drawing is made from
IdentityWho makes it, and what it is for.
- Designation
- 248
- Maker
- Underwood Ammo
- Country of origin
- United States
- Introduced
- 2012
- Military load
- No
- Widely available
- Yes
ProjectileThe figures the drawing and the solver start from.
- Bullet type
- JHP
- Cartridge
- 10mm Auto
- Bullet diameter
- 10.16 mm
- Bullet weight
- 12.96 g (200.0 gr)
- Sectional density
- 0.179
- Ballistic coefficient (G1)
- 0.164
- Reference velocity
- 366 m/s (1201 ft/s)
- Reference barrel
- 127 mm
- Velocity retention exponent
- 0.25
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
- 868 J
- Effective range
- 190 m
- Momentum
- 4.74 kg m/s
- Taylor knockout factor
- 10.3
- Hatcher relative stopping power
- 45
- Energy density
- 1903.4 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 | 366 m/s | 868 J | 0 cm | 0 s | 1.07 |
| 50 m | 321 m/s | 666 J | 10.5 cm | 0.146 s | 0.93 |
| 100 m | 293 m/s | 554 J | 47.2 cm | 0.31 s | 0.85 |
| 200 m | 256 m/s | 423 J | 225 cm | 0.677 s | 0.74 |
| 300 m | 227 m/s | 334 J | 586 cm | 1.093 s | 0.66 |
| 400 m | 203 m/s | 267 J | 1193.2 cm | 1.56 s | 0.59 |
| 500 m | 182 m/s | 215 J | 2122 cm | 2.08 s | 0.53 |
| 600 m | 164 m/s | 173 J | 3469 cm | 2.659 s | 0.48 |
| 800 m | 131 m/s | 111 J | 7953.3 cm | 4.027 s | 0.38 |
| 1000 m | 104 m/s | 70 J | 16162.3 cm | 5.74 s | 0.30 |
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/underwood-200-xtp' \ --header 'X-API-Key: your_key'