Fiocchi Defense Dynamics .357 Magnum 148 Grain Firearm Ammunition ammunition is designed for reliable personal defense. Loaded with quality components, this round delivers a muzzle velocity of 1,310 fps for powerful, consistent performance. The JHP bullet provides effective expansion and penetration, making it ideal for stopping power in critical situations. Packaged 50 rounds per box, it offers dependable protection and performance for your self-defense needs.