Nosler’s Intergral Partition – Supports the expanded mushroom and retains the rear lead-alloy core. The enclosed rear core retains more than two-thirds the original bullet weight for deep penetration. Special Crimp Locks – Add strength to resist deformation under the pressure of heavy magnums. Dual-Core Construction – Nosier’s special lead-alloy, dual-core provides superior mushrooming characteristics at virtually all impact velocities. Fully Tapered Copper Alloy Jacket – Raptures instantly at the thin jacket mouth, yet the gradual thickening along the bullet’s axis controls expansion, curls the jacket uniformly outward at high or low velocities.