Description
The Nosler Partition has been the gold standard for big game hunting since 1948, and Federal's Vital-Shok line combines this proven bullet with world-class brass and select powders. This .300 WSM load offers ballistic performance that mirrors the larger .300 Win Mag with less recoil, a genuine advantage if you're glassing hillsides all day or need faster follow-up shots.
How the Vital-Shok .300 WSM Performs
With a 180-grain Partition bullet at 2980 fps, this load delivers flat trajectory and excellent energy retention to around 850 yards for hunting applications. The Partition's partitioned lead core does two things that matter on game: the front section expands rapidly to create a wide wound channel, while the rear core stays intact to drive through heavy bone and muscle. You're looking at roughly two-thirds weight retention, which translates to deep, reliable penetration even on heavy-bodied game at closer ranges where velocity is higher.
Why the Partition Design Works
The Partition isn't just marketing hype. The bullet's tapered copper-alloy jacket controls expansion across a wide velocity range, from impact speeds around 1800 fps all the way up to magnum velocities. That means whether you're shooting at 100 yards or 500, the bullet performs as designed. Federal loads these with nickel-plated brass, which improves corrosion resistance and feeding reliability, and the rounds come primed and ready to shoot out of the box.
What to Expect in the Field
This is the ammunition you reach for when hunting elk, moose, or larger mule deer. The Partition's reputation comes from decades of field use across North America and beyond. The .300 WSM platform itself was designed around a lightweight rifle concept, so you get magnum performance from a more portable package. Twenty rounds per box means you'll have enough to sight in and hunt without excessive resupply runs.
Key Specifications
- Caliber: .300 Winchester Short Magnum (.300 WSM)
- Bullet Type: Nosler Partition
- Bullet Weight: 180 grains
- Muzzle Velocity: 2980 fps
- Case Material: Nickel-Plated Brass
- Primer Type: Boxer
- Rounds per Box: 20
- Boxes per Case: 10
- Manufacturer: Federal Ammunition
- MPN: P300WSMB
- UPC: 029465095079
What’s Included
- 20 rounds of factory-loaded .300 WSM ammunition
Frequently Asked Questions
What game is the .300 WSM 180gr Nosler Partition suitable for?
This load is ideal for elk, moose, and larger mule deer, particularly at ranges under 500 yards. The 180-grain Partition delivers the penetration and expansion needed for larger game while maintaining accuracy and energy at extended distances. The .300 WSM's flat trajectory makes it effective for hunting across varied terrain.
How does the Nosler Partition bullet work on impact?
The Partition's partitioned lead core allows the front half to expand rapidly, creating a wide wound channel and immediate energy release. The rear half stays intact and drives through dense tissue and bone for deep penetration. This design provides reliable performance across a wide velocity range, from close-range shots to extended distances.
Why choose .300 WSM over .300 Win Mag?
The .300 WSM delivers nearly identical ballistic performance to the larger .300 Win Mag but from a shorter action rifle, meaning lighter weight, less recoil, and faster follow-up shots. If you're hiking into a hunt or simply prefer a more compact platform, the WSM gets the job done without sacrificing stopping power.
Are these rounds reloadable?
Yes. The nickel-plated brass cases are boxer-primed, making them suitable for reloading. Nickel plating provides better corrosion resistance than standard brass and can extend case life through multiple reloading cycles.





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