Double Tap DT Lead Free Features The .40 S&W rounds from Double Tap are loaded with Barnes TAC-XP bullets which are known for their reliability in self-defense situations. These SCHP bullets provide excellent penetration and expansion crucial for stopping threats effectively. The ammunition is engineered to achieve a high velocity of 1390 fps from a Glock 23 with a 4.0 barrel delivering substantial energy transfer with 536 ft/lbs of force. Double Tap DT Lead Free Specifications Brand: Double Tap Brand Family: DT Lead Free Bullet Type: SCHP (Solid Copper Hollow Point) Caliber: .40 S&W Case Material: Brass Grain: 125 gr Lead Free: Yes Rounds: 20 Ballistics: 125gr. @ 1390fps / 536 ft/lbs from a Glock 23 (4.0 barrel); 1295fps / 468 ft/lbs from a 3.5 barrel