Quite possibly one of the best self-defense rounds on the market, the Federal Premium ® Personal Defense Ammunition offers accuracy and reliability you can trust your life on, at an affordable price. Equipped with a 135 grain expanding full metal jacket bullet in the 40 Smith & Wesson caliber, the Federal Premium ® Personal Defense Ammo is capable of reaching muzzle velocities of 1200 feet per second, strong enough to stop any would-be attacker in their tracks.