A buddy has it, its got lot of options, its also nice to have BC's for bullets already in the program. The thing I found puzzeling is The program comes up with very different #'s on bullets than mine does, his shows a 220grn 308 round nose, shot from an '06 as having only 3 or 4" more drop than a 168SMK from an '06 out to 1000yards, that can't be right. I think you should try point blank its free and works pretty well