I've been looking at the LR data sheets and data cards online and it appears from the prices they are asking they must be filled with gold fibers, or a pen laiden with gold ink must be used to record your shooting data. Most sell data books with dozens of different pages, including one where you have a data page with the outline of a human head as a target. But so far I haven't found the desire or interest to start shooting people in the head. And if you do find a nice data page then the various fields are filled with sample data that you can't erase! I guess I can make one up using EXCEL or some other program but my computer skills are lacking in the format department. Right now I use a spiral notebook and record stuff in no defined order. Some days I may record the temp or the wind and forget on other days. Anyone have any ideas?