Hornady Traditional 22 Caliber HP 55gr Reloading Bullets - 6000 Count - Hornady Traditional and FMJ bullets are built with a rugged 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. Rugged AMP Bullet Jackets Virtually Zero Variation Superior Design