Hornady Superformance Shotgun slugs feature the innovative, accurate and deep penetrating MonoFlex projectile in a 12 or 20 gauge load. At the heart of the Superformance Shotgun slug is the MonoFlex, a monolithic solid projectile made from gilding metal (95% copper / 5% zinc) and topped with the Hornady exclusive Flex Tip feature that works as a catalyst for uniform expansion, even at the low velocities of longer range impacts. The MonoFlex won't separate, and retains 95% of its original weight. Specifically engineered to deliver accuracy, penetration and extremely high weight retention, the MonoFlex is a non-traditional alternative metal option, a fantastic choice for all hunters. Fueled by the use of specially blended propellants, the Superformance shotgun slug is built to deliver maximum velocity for flatter trajectories and enhanced terminal performance. The slug's internal sabot and gas seal construction is scientifically engineered to trap gases that deliver uniform pressure and velocity while working to force open the petals and uniformly push the slug toward its target accurately. All of these features combine to create a slug capable of taking everything from Midwest whitetails to Alaskan moose.