Hornady Critical Defense Ammunition was purpose built for concealed carry guns and designed to deliver reliable and controlled expansion regardless of target every time.. Critical Defense Ammunition is loaded with Hornady's bullet which has a soft polymer insert that delivers superior controlled expansion and large, deep wound cavities over a wide range of velocities. Each round is loaded with premium low flash propellants that deliver proven performance, even in very short-barreled handguns that will not disrupt your vision. This ammunition was designed by Hornady to expand every single time. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.