The Nosler Trophy Grade 300 Remington Ultra Magnum 180 grain Partition Spitzer ammo delivers the controlled expansion and deep penetration that serious hunters demand in a magnum rifle round. Built on Nosler's legendary Partition bullet—a design that's been the gold standard for controlled-expansion hunting ammunition since 1948—this load pairs proven bullet technology with premium Nosler brass to give you ammunition you can trust when the moment matters. Each box contains 20 rounds ready to load into your 300 RUM.

The Partition bullet's dual-core design is the key to its reputation. The front core expands rapidly on impact for energy transfer and a quick, ethical kill, while Nosler's integral partition—a copper wall inside the bullet—keeps the rear core intact. This engineering choice means you retain more than two-thirds of the original bullet weight as it penetrates, ensuring that deep, vital-organ shots on larger game result in complete, reliable performance. It's why generations of hunters have chosen Partition bullets for elk, moose, and other big game where margin for error is small.

Trophy Grade ammunition is Nosler's commitment to consistency and reliability. Loaded with premium brass and paired with the proven Partition bullet, it represents ammunition built to the same standards as the components Nosler sells to reloaders who demand the absolute best. When you're planning a hunt—especially one where you've invested time, money, and anticipation—this is the ammunition that lets you focus on hunting, not worrying about whether your round will perform.

The Nosler Trophy Grade 300 Remington Ultra Magnum 180 grain Partition Spitzer ammo delivers the controlled expansion and deep penetration that serious hunters demand in a magnum rifle round. Built on Nosler's legendary Partition bullet—a design that's been the gold standard for controlled-expansion hunting ammunition since 1948—this load pairs proven bullet technology with premium Nosler brass to give you ammunition you can trust when the moment matters. Each box contains 20 rounds ready to load into your 300 RUM.

The Partition bullet's dual-core design is the key to its reputation. The front core expands rapidly on impact for energy transfer and a quick, ethical kill, while Nosler's integral partition—a copper wall inside the bullet—keeps the rear core intact. This engineering choice means you retain more than two-thirds of the original bullet weight as it penetrates, ensuring that deep, vital-organ shots on larger game result in complete, reliable performance. It's why generations of hunters have chosen Partition bullets for elk, moose, and other big game where margin for error is small.

Trophy Grade ammunition is Nosler's commitment to consistency and reliability. Loaded with premium brass and paired with the proven Partition bullet, it represents ammunition built to the same standards as the components Nosler sells to reloaders who demand the absolute best. When you're planning a hunt—especially one where you've invested time, money, and anticipation—this is the ammunition that lets you focus on hunting, not worrying about whether your round will perform.