Hornady Handgun Hunter(TM) ammunition is built around a bullet as rough and rugged as the conditions and game demand. The MonoFlexA(R) handgun projectile is manufactured with a tough copper alloy that achieves deep penetration and 95% weight retention. Bullet expansion across a range of velocities is aided with a proprietary elastomer material added to the bullet's open cavity. Upon impact, the elastomer compresses, then pushes out and causes the bullet to expand faster than a standard hollow point design. Combined with premium cases, primers and propellants, Handgun Hunter(TM) ammunition benefits from years of producing hard-hitting GMXA(R) and MonoFlexA(R) rifle bull Mfg: Hornady