Last reviewed: 2026-04-19 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
For elk, moose, and dangerous game at extended ranges, the Swift High Grade 300 Winchester Magnum ammo delivers controlled expansion and deep wound channels. The 180-grain Swift A-Frame bonded bullet holds together during bone strikes, shedding minimal mass while maintaining a straight wound track. At 3006 feet per second from a 24-inch barrel, this load carries 3611 foot-pounds of energy to the target — enough velocity to expand the bonded core at 400+ yards while retaining penetration through shoulder bone at closer distances.
Load Profile
Swift hand-inspects each round during assembly. Brass cases are individually chambered to verify headspace, then sealed with HERNON compound at the primer pocket and case mouth to prevent moisture intrusion during mountain hunts or wet-weather tracking. The bonded construction of the A-Frame bullet locks the lead core to the copper jacket, preventing core-jacket separation on impact with heavy bone or dense muscle. Ballistic coefficient of 0.4 and sectional density of 0.271 mean this bullet sheds velocity slower than flat-base designs and drives deeper than lighter pills in the same caliber.
Specs at a Glance
| Spec | Value |
|---|---|
| Caliber | 300 Winchester Magnum |
| Bullet weight | 180 grains |
| Bullet type | Swift A-Frame bonded round nose |
| Muzzle velocity | 3006 fps (24″ barrel) |
| Muzzle energy | 3611 ft-lbs |
| Ballistic coefficient (G1) | 0.4 |
| Sectional density | 0.271 |
| Rounds per box | 20 |
| Case | Brass (reloadable) |
| Primer | Boxer, non-corrosive |
| Intended use | Hunting (elk, moose, bear, dangerous game) |
| Manufacturer | Swift |
This load suits bolt-action rifles in 300 Win Mag with 24- to 26-inch barrels. Pair it with a 1:10 twist barrel for stabilization at altitude. The bonded bullet resists fragmentation on shoulder shots, making it a top choice when shooting quartering angles on heavy-bodied game.
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.
- Treat every firearm as loaded. Keep muzzle pointed in a safe direction at all times.
- Verify current federal, state, and local ammunition regulations before purchase — some jurisdictions restrict lead-core hunting loads during certain seasons.
- This product contains lead. Store in original packaging and wash hands after handling. Pregnant women and children should minimize contact with lead-based projectiles.
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