Hornady MonoFlex ML 50 Caliber Sabot Bullets - 20 Pack - At the heart of the MonoFlex ML is the .452in diameter MonoFlex bullet, a monolithic solid projectile made from a copper alloy and topped with the patented Hornady exclusive Flex Tip design 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 provide phenomenal accuracy, penetration, and high weight retention, the MonoFlex ML is a nontraditional/alternative metal construction bullet option that is a fantastic choice for all hunters. Patented Flex Tip Technology Delivers Enhanced Terminal Performance Reliable Expansion Even At Low Velocities Accurate Monolithic Solid Construction High 95% Weight Retention