The Hornady® Handgun Hunter® .40 S&W 135gr MonoFlex® ammo features clean-burning powders and propellants paired with premium components that are loaded in premium brass casings for dependable ignition, super-flat trajectories, and smooth operation in virtually any hunting environment. Featuring Hornady's tough copper alloy Monoflex bullet, this ammo allows for deep penetration and retains 95% of its weight with an elastomer material in its open cavity that compresses upon impact and then pushes out for lethal rapid expansion and maximum impact. 20 Rounds. Made in USA.