Before my Hard drive exploded, I used to have a balistics program called BIGGUN-MT. (It used Metric units.) I would enter caliber, shell weight, form factor, MV and ellivation. It would then list the range, RV and altitude for every five seconds of flight. Maybe other things too, I just can not remember right now. If anyone out there knows of any similar program please post the link or address here. Thank you. Sincerely, SFD.