Remington HTP "High Terminal Performance" ammunition is designed with self-defense and hunting in mind. All HTP ammunition feature an appropriate expanding type bullet designed for the task at hand. Waterproof sealant is used on the primers and case mouths to ensure consistent performance from everyday carry or adverse conditionsSpecifications: Cartridge: 357 Magnum Grain Weight: 158 Grains Quantity: 20 Round Test Barrel Length: 4 inches Muzzle Velocity: 1235 Feet Per Second Muzzle Energy: 535 Foot Pounds Bullet Style: Semi-Jacket Hollow Point Lead Free: No Case Type: Brass Primer: Boxer Corrosive: No Reloadable: Yes