About the Bullet Remington 45 ACP Auto is loaded with a 185 grain brass Jacketed Hollow Point. Dead serious innovation, a superior bullet for when stakes are high, this high performance jacket handgun ammunition was built around revolutionary hollow point design. The bullet jacket is made of brass, which releases energy over longer distance while mushrooming and a spiral nose cut feature allows mushrooming at a lower velocity without sacrificing penetration or terminal performance. The precise hollow point cavity design also increases penetration by minimizing lead core deformation. Remington Golden Saber is new production, non-corrosive ammunition in boxer primer and reloadable brass cases.