The Nosler Partition is still the benchmark by which all modern bullets are measured. So, the next time you reach for a box of bullets, ask yourself, "is it as good as a Partition". Every Partition bullet in the Nosler line delivers optimum length, weight and ogive design for maximum in-flight and terminal performance. Nosler engineering - Nosler's special lead alloy, dual core provides superior mushrooming characteristics at virtually all impact velocities Fully-tapered copper-alloy jacket - ruptures instantly at the thin jacket mouth, yet the gradual thickening along the bullet's axis controls expansion and curls the jacket uniformly outward at high and low velocities Nosler's integral partition - supports the expanded mushroom and retains the rear lead-alloy core, the enclosed rear core retains more than two-thirds of the original bullet weight for deep penetration Dual core construction - every Partition bullet in the Nosler line delivers optimum length, weight and ogive design for maximum in-flight and terminal performance Special crimp locks - adds strength to resist deformation under the pressure of heavy magnums