Ballistics Calculators
Range Table |
| Range (yrd) |
Velocity (ft/s) |
Energy (ft-lb) |
Path (in) |
Momntm (lb-s) |
Time (sec) |
Drop (in) |
Adjust (MOA) |
MaxHght (in) |
10mph CW(in) |
|---|---|---|---|---|---|---|---|---|---|
| 0 | 2,910 | 2,820 | -1.50 | 1.94 | 0.000 | 0.00 | -0.60 | 0.00 | |
| 25 | 2,835 | 2,676 | -0.20 | 1.89 | 0.026 | 0.13 | 0.81 | -0.57 | 0.06 |
| 50 | 2,761 | 2,538 | 0.82 | 1.84 | 0.053 | 0.53 | -1.65 | -0.46 | 0.26 |
| 75 | 2,688 | 2,406 | 1.56 | 1.79 | 0.081 | 1.22 | -2.08 | -0.28 | 0.58 |
| 100 | 2,617 | 2,280 | 2.00 | 1.74 | 0.109 | 2.21 | -2.00 | -0.02 | 1.03 |
| 125 | 2,546 | 2,159 | 2.13 | 1.70 | 0.138 | 3.51 | -1.70 | 0.32 | 1.60 |
| 150 | 2,477 | 2,043 | 1.92 | 1.65 | 0.168 | 5.15 | -1.28 | 0.77 | 2.31 |
| 175 | 2,409 | 1,932 | 1.37 | 1.60 | 0.198 | 7.13 | -0.78 | 1.31 | 3.14 |
| 200 | 2,341 | 1,826 | 0.43 | 1.56 | 0.230 | 9.50 | -0.21 | 1.97 | 4.16 |
| 225 | 2,275 | 1,724 | -0.92 | 1.52 | 0.262 | 12.27 | 0.41 | 2.75 | 5.37 |
| 250 | 2,210 | 1,627 | -2.69 | 1.47 | 0.296 | 15.47 | 1.08 | 3.66 | 6.75 |
| 275 | 2,146 | 1,534 | -4.90 | 1.43 | 0.331 | 19.11 | 1.78 | 4.71 | 8.29 |
| 300 | 2,083 | 1,446 | -7.57 | 1.39 | 0.366 | 23.21 | 2.52 | 5.91 | 10.00 |
- The sectional density is the weight of the projectile in pounds divided by the square of the diameter (SD=W/d2) and is an important number when considering penetration.
- The form factor is the ballistic coefficient divided by the sectional density (i=SD/BC), and is a measure of how closely the profile of the projectile matches the G1 standard projectile.
Calculate Ballistic Coefficient (G1) | Back to top |
To calculate the ballistic coefficient from range data, two velocity measurements and the distance between them are required.
Calculate Muzzle Velocity from Instrumental Velocity | Back to top |
To calculate the muzzle velocity, a velocity measurement, the ballistic coefficient and the distance from the muzzle to the measurement point are required.
Effects of Barometeric Pressure, Temperature and Altitude | Back to top |
Firing under anything other than Standard Metro conditions changes the effective ballistic coefficient of the projectile (from Sierra´s 6th Ed). Standard Metro conditions are:
- Altitude: Sea level
- Barometric Pressure: 750 mm Hg = 29.53 inches Hg
- Temperature: 59°F = 15°C
- Relative Humidity: 78%
- Air Density: 0.0751265 lb/ft3 = 1.2030 kg/m3
- Speed of Sound: 1120.27 fps = 341.46 m/s
- Acceleration due to gravity: 32.174 f/s2 = 9.80665 m/s2
Calculate Free Recoil Energy | Back to top |
To calculate the free recoil energy of a firearm, the weight of the gun, the weight of the powder charge, the weight of the bullet or shot+wad and the muzzle velocity are required. The free recoil energy is the work that must be done to control the firearm upon firing.