The Hornady® Interbond® bullet uses a proprietary bonding process that holds the core and jacket together. Unlike partitioned or dual-core bullets, where the front core can separate from the bullet mass, the InterBond® bullet holds together in a single destructive mass that delivers a deep, wide wound channel without over-penetrating. The bonding process, along with a thicker, stiffer jacket, allows InterBond® bullets to retain more than 90% of their mass, even through tough hide and bones. Plus they immediately expand to more than twice their diameter for maximum energy transfer. Features: Polymer Tip The sleek polymer tip improves ballistic performance, accuracy and initiation of expansion. Bonded Core The bonded design ensures that the bullet achieves controlled expansion with virtually no fragmentation and the core will never separate from the jacket. Expansion Control Ring Controls expansion to form a large, flat mushroom and a wide wound channel over twice the bullet diameter. Thick, Tough Jacket Necessary to retain weight and contributes to expansion of over twice the bullet diameter.