Outstanding Accuracy and Terminal Performance Patented, Tumble Upon Impact Design Solid Copper match-grade projectiles The velocity is calculated based on the SAAMI unit using the average of 20 rounds. Grain Weight: 55gr Overall Length: .868 Bullet Diameter: .2240 Projectile 50 Round Box Weight: 0.70 Disclaimer: We follow the guidelines set by the Sporting Arms and Ammunition Manufacturers Institute, Inc (SAMMI) Specs in order to provide safety to our customers. Everything is measured within the tolerance of pressure and COAL set by SAMMI Specs. (Never load casings under 75% of available volume. (With projectile fully seated.)