Here's a few offered ballistic programs.
On-line (web based)
JBM
http://www.eskimo.com/~jbm/calculations/calculations.html
Downloadable: (Free) "Right" click and "Save Target As" on your local PC.
The "Thing"
http://www.the-king-family.com/Shooting/BallisticsCalculator01Aug2004.xls
Jackson Rifles
http://www.jacksonrifles.com/ballistics.htm
On-line (web based)
JBM
http://www.eskimo.com/~jbm/calculations/calculations.html
Downloadable: (Free) "Right" click and "Save Target As" on your local PC.
The "Thing"
http://www.the-king-family.com/Shooting/BallisticsCalculator01Aug2004.xls
Jackson Rifles
http://www.jacksonrifles.com/ballistics.htm