Hornady’s FMJ Bullets are built with the exclusive AMP (Advanced Manufacturing Process) bullet jacket that clearly delivers better performance. The thin-plated full metal jacket offered by other manufacturers is easily distorted and often breaks or separates when the bullet impacts the target. The Hornady AMP bullet jacket features virtually zero tolerance for concentricity and near-zero wall thickness variation, punching through targets without deforming or breaking. Features of the Hornady FMJ Bullet: AMP Jacket Virtually zero tolerance for concentricity Near-zero wall thickness variation Minimal deformation or breaking Hornady FMJ RN 9mm/.355 Cal 115gr Bullets (100/Box) 35557