Nosler Trophy Grade 338 Winchester Magnum 250 Grain Partition Ammo - 20 Rounds

The Nosler Trophy Grade 338 Winchester Magnum 250 grain Partition ammo delivers the controlled expansion and deep penetration that made the Partition bullet a hunting standard for over 75 years. Built on Nosler's premium brass and loaded to Trophy Grade standards, this 20-round box pairs the right velocity and bullet design for hunters pursuing mid-to-large game at extended range. The .338 Win Mag's power and the Partition's proven two-stage expansion make this a solid choice for hunters who demand reliability when it counts.

The Partition bullet's dual-core design is the key to its reputation. The front core expands rapidly on impact to create the initial wound channel, while the integral steel partition separates the two cores—allowing the rear core to stay intact for bone-breaking penetration. This design retains more than two-thirds of the original bullet weight, ensuring you get the depth of wound channel needed for ethical, one-shot kills on game that require serious penetration.

If you've built a .338 Winchester Magnum for hunting elk, moose, or long-range deer, Trophy Grade ammunition takes the guesswork out of the equation. Nosler Premium Brass and factory-controlled assembly mean you can focus on shot placement rather than ammunition inconsistency. At distance or in thick country where long shots are unavoidable, the combination of caliber and proven bullet design gives you the edge.

Key Features

• 250 grain Partition bullet—the original dual-core hunting design
• Rapid expansion front core with controlled rear-core penetration
• Loaded on Nosler Premium Brass for consistent performance
• Factory-loaded to Trophy Grade standards for reliability
• Retains over two-thirds original bullet weight for deep penetration
• 20 rounds per box

Specifications

Frequently Asked Questions

Is this ammunition suitable for hunting elk and moose?

Yes. The .338 Winchester Magnum with a 250 grain Partition bullet is a proven elk and moose cartridge. The Partition's design—with its front-core expansion and rear-core penetration—handles the deep, heavy bone structure of large game effectively.

What makes the Partition bullet different from other hunting bullets?

The Partition features a dual-core design separated by an integral steel partition. The front core expands rapidly on impact while the rear core stays intact, allowing the bullet to penetrate deeply while shedding controlled amounts of weight. This design has been the benchmark for hunting bullets since 1948.

What is included in a box?

Each box contains 20 rounds of Nosler Trophy Grade .338 Winchester Magnum ammunition loaded with 250 grain Partition bullets on premium brass.

Why use Nosler Premium Brass?

Nosler Premium Brass is produced to exacting standards for consistency in wall thickness and weight, which supports more uniform velocities and better accuracy from shot to shot compared to standard brass.