Hornady Superformance, Lead Free, 12 Gauge, 2.75, 300 Grain, MonoFlex, Sabot Slug, 5 Round Box, California Certified Nonlead Ammunition 86236 At the heart of the Superformance Shotgun slug is the MonoFlex projectile topped with the Hornady exclusive Flex Tip design that works as a catalyst for uniform expansion, even at low velocities. The MonoFlex won't separate, and retains 95% of its original weight.