Exterior Ballistics

Ballistics of Air Guns

Interior Ballistics

Exterior Ballistics 2.4


New program for computation of ballistic trajectory of spin-stabilized bullets. Click here to download!

Short introduction to Exterior Ballistics 2.4 from a users perspective written by Jochem Peelen:



  • Program has only 1.7 MB, no installation (only unpack the zip file).

  • Based on "Modified Point-Mass Trajectories", according to STANAG 4355.

  • Computation of the trajectory for zero range or angle of departure:


  • Bullets and cartridges database (597 bullets, 1295 cartridges):

  •  Results: save to file, load from file:

  • All atmospherics conditions (ICAO atmosphere): air pressure, temperature and humidity.

  • Cross, longitudinal and vertical wind.

  • Variable cross wind along bullet trajectory:

  • Simple methods for computation of the bullet stability.

  • The Most Recommended Distance (MRD, GEE):

  • Shooting UP/Downhill:

  • MilDot computation:

  • Computation modes: ballistic coefficient, form factor or variable ballistic coefficient (for Sierra bullets):

  • All common drag functions: G1, G2, G5, G6, G7, G8, GL, GS, GC, RA4, 1943.

  • Drag functions for Lapua bullets:

  • 134 drag functions from Exterior Ballistics 4.0 by the courtesy of Ruprecht Nennstiel (list in pdf)

  • Computation of the ballistic coefficient from the velocity drop or from the trajectory.

  • Coriolis force.

  • Bullet drift (also for high angles of departure):

  • Unit conversion and ballistic coefficient conversion:


  • ICAO atmosphere computation. Influence of the barrel length and powder temperature. Computation of the energy and momentum:



Program "Exterior Ballistics 2.4" is intended for Windows 2000, XP, Vista and 7. This is a demo version of the program. Velocity in the demo is set to 555 m/s and can not be changed. Price of full version is not set yet, but I offer some programs gratis for testing.

If you have an interest, please send me your "Activation Code" at and I will send you a file "key". Activation Code is visible after starting the program (see the picture below) on your PC. Full version is activated by copying the file named "key" to the program's directory (see the picture below).




Click here to download!