Sierra V6 is good for 1982 format. Its a good program. I just feel they could have dressed up the format. For 2009 standards , the format really sucks. Its not user friendly , restricts to 5 bullets/per inventory, Print is too small for failing eyes. Come on , They certainly could have done a better job. They should go out and hire a program designer. The may be great ballistions , but software designers they are not. Got to Hornady home page and take a look. lightbulb