The Nosler Partition is a hunting bullet with the following features:
Dual-core design: The bullet has two lead cores separated by a partition. The front core expands rapidly, while the partition supports the expanded mushroom and the rear core remains intact. This allows the bullet to retain more than two-thirds of its original weight for deep penetration.
Copper-alloy jacket: The jacket is fully tapered and ruptures on impact, curling outward uniformly.
Integral partition: The partition supports the expanded mushroom and retains the rear core.
Special crimp locks: These add strength to resist deformation under pressure.
Mushrooming characteristics: The bullet's dual-core design and special lead alloy provide superior mushrooming characteristics at almost all impact velocities.