Bonded Defense .40 SW Features The DoubleTap Ammunition 40 S&W Bonded Defense Ammunition features a 180 grain hollow point round that offers exceptional penetration and expansion. The nickel plated brass casing increase lubricity for more reliable extraction. Out of a 4.5" barrel this .40 S&W hollow point ammo exits the barrel at 1140 fps with 520 ft.-lbs. of energy. Bonded Defense .40 SW Specifications MFR:40180BD UPC:091037349361 Caliber:.40SW Type:Jacketed Hollow Point Grain Weight:180Gr Model:Bonded Defense Muzzle Energy:520 ft.-lbs. Muzzle Velocity:1140 fps Rounds per Box:20 Rounds per Case:1000