Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
Federal Fusion 300 Winchester Magnum ammo, loaded with a 180-grain bonded round nose projectile, is purpose-built for hunters pursuing elk, moose, and large whitetail at extended range. The 300 Winchester Magnum is a belted magnum rifle cartridge introduced in 1963, combining flat trajectory with substantial energy transfer — this load exits the muzzle at 2960 feet per second with 3500 foot-pounds of energy, enough authority for ethical one-shot stops on game animals exceeding 500 pounds at distances beyond 300 yards. Federal employs an electrochemical bonding process that molecularly fuses the lead core to the copper jacket, preventing the catastrophic separation that ruins penetration on heavy bone.
Built for the Box
Federal Fusion ammunition uses a pressure-skived nose cavity and a boat-tail base to stabilize the bullet in flight while initiating controlled expansion on impact. The bonded construction ensures near-100% weight retention — recovered bullets from game animals consistently weigh within 5% of their original 180 grains, driving straight-line wound channels through shoulder blade, rib, and vitals. Each round is loaded in new-production brass cases with non-corrosive Boxer primers, making these cases reloadable for handloaders who want to dial in custom velocity nodes. Federal manufactures this ammunition in the United States to SAAMI pressure specifications.
The Numbers
| Spec | Value |
|---|---|
| Caliber | 300 Winchester Magnum |
| Bullet weight | 180 grains |
| Bullet type | Bonded Round Nose |
| Muzzle velocity | 2960 fps |
| Muzzle energy | 3500 ft-lbs |
| Rounds/box | 20 |
| Case | Brass |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Intended use | Hunting |
| Manufacturer | Federal |
The 180-grain bullet weight sits in the sweet spot for 300 Winchester Magnum — heavy enough to retain velocity past 400 yards, light enough to maintain flat trajectory inside 300. Handloaders running bolt-action rifles with 24-inch or 26-inch barrels can expect consistent sub-MOA groups at 100 yards when brass is sorted by headstamp and loaded to optimal powder charge. Browse our full 300 Win Mag ammo inventory for additional bullet weights and terminal designs.
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.
- Follow the four universal rules of firearms safety: treat every firearm as loaded, never point at anything you are not willing to destroy, keep your finger off the trigger until sights are on target and you have decided to shoot, and know your target and what lies beyond it.
- Verify that your rifle is chambered in 300 Winchester Magnum and that the firearm is in safe operating condition before loading. Inspect cases for splits, dents, or corrosion before chambering.
- This ammunition contains lead, a substance known to the State of California to cause cancer and reproductive harm. Wash hands thoroughly after handling ammunition or spent cases, and always shoot in well-ventilated areas.
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