This is a slick little program for air gunners. – ChairGun Review

Seems to do all the basics and then some for a ballistics calculator. Only thing I'd add would be to extend the pellet library a little more; add Gamo Raptor and some of the other PBA pellets. Also raise the velocity limit from 1200 fps to maybe 1500 fps. My Webley Patriot has been chronographed at well over 1300 fps with PBA pellets.
Review by Rodenator on ChairGun.