Dad gave me his reloading stuff lately which included some Lyman's Reloading Handbook's. The latest is the 47th Edition dated 1992. How has the components (powder, primers, and bullets) performance increased since then? Is the data in the book extremely outdated? The primary data I care about is for the .257 and 7MM Mag. TIA


Nathan Carl Goff 19 Sept 2016 - 14 Jan 2017.