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External Ballistics

External Ballistics calculations made easy!

Wanting to understand or getting involved with external ballistics calculations can be a mine field. Here we hope to share our experience and knowledge gained over many years in this field. It is a practical approach, hoping to keep it simple and easy for all and empower readers.

Each page opens as a new tab to make it easy to copy and paste as you make progress. The expected outcome is to measure the Ballistic coefficient, empowering shooters to rather measure than read and believe.

Follow the sequence with some testing and measure/calculate the Ballistic Coefficient for your ammo.

  1. Visit the Standard Atmosphere listing. Which Standard is used as reference?
  2. Calculate the Drag and Drag Force between two points. Used for Drag Coefficient calculations.
  3. Calculate Virtual Temperature, Speed of Sound and Air Density
  4. Calculate Drag Coefficient.
  5. Convert Ballistic Coefficient The Ballistic Coefficient has more than one form or unit.
  6. Calculate Ballistic Coefficient. Use the results from the above calculations and calculate the Ballistic Coefficient.
External Ballistics calculation images.