This one is not free, but I decided this past Saturday to give it a try.
www.loaddata.com is a web-based division of Wolfe Publishing Co. (Handloader and Rifle Magazines). They are putting their years of accumulated data from the magazine articles on the web. Price was $14.95 for a one year subscription - I have only played with it so far, the .45 Colt section was good, others are skimpy, but they claim to be adding the new data from the magazines each month and several older (back issues) each month as well. You do no get the article, only the data. As I save all of my old Handloader Mags for the data I decided that it was worth a one year experiment to see how I liked the web-based version. NG Bruce