Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
Buffalo Bore Supercharged 300 Winchester Magnum ammo pairs a 200-grain Barnes Triple-Shock X (TSX) bullet with hot-loaded powder charges that reach 2900 feet per second at the muzzle. At that velocity, this all-copper projectile carries 3734 foot-pounds of energy downrange—enough to anchor elk, moose, and bear-sized game at extended range. The TSX hollow point is machined from a solid copper billet and expands into four cutting petals upon impact, creating permanent wound channels while the shank drives deep through bone and heavy muscle. Because the bullet contains zero lead, it meets lead-free hunting regulations in California and other restricted zones. You get 20 rounds per box, each loaded in reloadable brass with a non-corrosive Boxer primer.
Built for the Box
Buffalo Bore loads every cartridge to maximum SAAMI pressure specifications, extracting velocity potential that factory hunting loads often leave on the table. The company machines its own loading dies and uses lot-specific powder charges to maintain single-digit extreme spreads across production runs. Each case is once-fired brass that has been resized, trimmed to length, and inspected for case-head separation or hairline cracks before receiving a new primer. The Barnes TSX bullet is a monolithic solid—no jacket to separate, no core to fragment—and the four-petal design peels back predictably even when striking heavy shoulder bone at oblique angles. The 0.423 G1 ballistic coefficient and 0.301 sectional density keep the bullet stable past 400 yards in typical hunting winds.
The Numbers
| Spec | Value |
|---|---|
| Caliber | 300 Winchester Magnum |
| Bullet weight | 200 grains |
| Bullet type | Barnes Triple-Shock X Solid Hollow Point |
| Muzzle velocity | 2900 fps |
| Muzzle energy | 3734 ft-lbs |
| G1 ballistic coefficient | 0.423 |
| Sectional density | 0.301 |
| Rounds per box | 20 |
| Case | Brass (reloadable) |
| Primer | Boxer, non-corrosive |
| Lead-free | Yes |
| Intended use | Hunting |
| Velocity rating | Supersonic |
| Country of origin | United States |
| Manufacturer | Buffalo Bore |
This load is engineered for bolt-action and single-shot rifles chambered in 300 Winchester Magnum. Do not use in older or weaker actions; Buffalo Bore loads to maximum SAAMI pressure, and vintage rifles may not be proof-tested to modern standards. For additional 300 Winchester Magnum options, browse the full 300 Win Mag ammo catalog at Tatted Tacticals.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle 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 follow the four universal rules of firearms safety when handling rifles and ammunition.
- Verify your state and local laws before purchasing. Some jurisdictions restrict lead-free or high-velocity hunting ammunition.
- This product contains copper and lead-free components. California Proposition 65 does not apply to this ammunition. Store in original packaging to prevent moisture ingress.
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