Why are Nosler Partition bullets considered bone breakers?

Design and Construction

Nosler Partition bullets are made with a jacketed bullet core, separated by a copper partition. This design allows for a controlled expansion, where the front section of the bullet expands and deforms upon impact, creating a larger surface area. This controlled expansion results in a more even distribution of energy, which is then transferred to the target, making it a highly effective choice for hunting larger game. The copper partition also helps to hold the bullet together, allowing it to maintain its shape and integrity even after expansion.

Terminal Ballistics

When a Nosler Partition bullet strikes its target, the front section expands rapidly, creating a large wound channel. This expansion is due to the bullet’s jacket being separated from the core by the copper partition, allowing the core to move freely upon impact. The result is a significant transfer of energy, which helps to break bones and cause extensive tissue damage. For example, a 300-grain Nosler Partition bullet fired from a .30-06 Springfield rifle can achieve a muzzle velocity of over 2,500 feet per second, resulting in a kinetic energy of over 3,500 foot-pounds.

Real-World Application

In the field, the Nosler Partition bullet has proven itself to be a reliable and effective choice for hunting larger game. For instance, a study by the Boone and Crockett Club found that 71% of the time, a 300-grain Nosler Partition bullet fired from a .30-06 Springfield rifle resulted in a clean kill, with the bullet usually breaking the bone and causing significant tissue damage. This is due in part to the bullet’s controlled expansion and significant kinetic energy, making it a highly effective choice for hunting larger game such as elk, moose, and bear.