OverWatch comes at the request of a government agency for a barrier-penetrable bullet that provides maximum hydrostatic shock with controlled expansion. Libertys use of lightweight bullets make for a low-recoiling cartridge that, interestingly, equates to high energy displacement for hard-hitting terminal performance. Plus, because of the reduced weight, more rounds can be carried onboard the operator without slowing her/him down.OverWatch is slated to come in following chamberings: 9 mm Luger, .45 ACP, .357 Mag., 10 mm Auto, .223 Rem., and 300 BLK. Handgun cartridges will feature a black-nickel-plated case and silver-colored nickel projectiles, rifle rounds are finished in bright nickel plating. Series Defense Caliber 9mm Luger Application Home Defense Bullet Type Open Cavity Design Bullet Weight 72 gr Boxes Per Case 50 Rounds Per Box 20 Casing Material Nickel-Plated Brass Muzzle Velocity 1720 fps Unit Of Measure box