The first reloading handbook dedicated exclusively to the most popular semi-auto rifle in the United States has now been updated to include new calibers and data. The 2nd Edition of this comprehensive Lyman handbook provides the AR shooter with reloading data for nearly all AR based calibers. Reloaders will appreciate the extensive pressure tested data that encompasses all popular brands of bullets and powders. The 2nd Edition contains new calibers such as the 224 Valkyrie, 22 Nosler, 24 Nosler, 350 Legend, as well as sub-sonic data. In addition, articles by well-known authorities covering topics such as “Building An AR”, and “AR15 Gas System Lengths” are included.