Supercharge your rifled barrel slug gun with Hornady Superformance Shotgun Slugs! 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 opt Mfg: Hornady