Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
Nosler Trophy Grade 300 Winchester Magnum ammo delivers controlled expansion and deep penetration for elk, moose, and other heavy-bodied game. This production-run hunting load chambers a 200-grain Nosler Partition jacketed soft point driven at 2750 fps and 3357 ft-lbs of muzzle energy. The Partition’s dual-core design splits expansion duty: the front core mushrooms on impact while the rear core stays intact behind an integral copper partition, retaining more than half the original bullet weight through hide, bone, and vitals. Brass cases, Boxer primers, reloadable.
Built for the Box
Nosler manufactures Trophy Grade ammunition to match tolerances — each round hand-inspected before packaging. The Nosler Partition bullet features a fully tapered jacket that ruptures at the thin mouth, curling uniformly outward at velocities from 1800 fps to 3200 fps. The gradual jacket thickening along the bullet’s axis controls the rate of expansion, while the integral copper partition physically separates the front lead core from the rear core. This mechanical barrier prevents core separation during deep penetration, a common failure mode in conventional cup-and-core bullets. A special crimp locks the rear core section in place under magnum pressures. The G1 ballistic coefficient of 0.481 and sectional density of 0.301 maintain velocity and momentum downrange.
The Numbers
| Spec | Value |
|---|---|
| Caliber | 300 Winchester Magnum |
| Bullet weight | 200 grains |
| Bullet type | Nosler Partition Jacketed Soft Point |
| Muzzle velocity | 2750 fps |
| Muzzle energy | 3357 ft-lbs |
| G1 ballistic coefficient | 0.481 |
| Sectional density | 0.301 |
| Rounds per box | 20 |
| Case | Brass |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Lead-free | No |
| Intended use | Hunting |
| Manufacturer | Nosler |
The 300 Winchester Magnum cartridge delivers flat trajectory and high retained energy at extended ranges, suitable for western hunting where shots stretch past 300 yards. For more loads in this chambering, see our full 300 Win Mag ammo selection.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition cannot be shipped to certain states, counties, and cities — review our ammunition shipping restrictions before ordering. Store ammunition in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Always treat every firearm as if it is loaded. Keep the muzzle pointed in a safe direction at all times.
- Verify your firearm is chambered for 300 Winchester Magnum before loading. Do not mix ammunition types.
- This ammunition contains lead. Wash hands thoroughly after handling. California Proposition 65 warning applies.
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