Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
Winchester Match 338 Lapua Magnum ammo is purpose-built for competitive precision rifle shooters and long-range accuracy testing. Loaded with 285-grain jacketed hollow point boat tail projectiles, this ammunition exits the muzzle at 2690 feet per second with 4578 foot-pounds of energy. The G1 ballistic coefficient of 0.756 (G7 0.356) minimizes wind drift and velocity loss downrange, making it a practical choice for match stages extending beyond 1000 yards. Winchester produces this ammunition in the United States under tight tolerances — clean-burning powder and boxer primers reduce fouling and support consistent chamber pressures across the entire 20-round box.
Built for the Box
Each 338 Lapua Magnum cartridge is assembled with new brass cases, non-corrosive boxer primers, and reloadable components. The jacketed hollow point boat tail design stabilizes quickly after barrel exit, and the supersonic velocity rating ensures predictable flight characteristics in most atmospheric conditions. Lead is present in the projectile core; refer to California Proposition 65 warnings if applicable in your jurisdiction. Shipping weight for this 20-round box is 2.105 pounds, and the product is DOT-regulated for hazmat transport.
The Numbers
| Spec | Value |
|---|---|
| Caliber | 338 Lapua Magnum |
| Bullet weight | 285 Grains |
| Bullet type | Jacketed Hollow Point Boat Tail |
| Muzzle velocity | 2690 Feet Per Second |
| Muzzle energy | 4578 Foot Pounds |
| Rounds/box | 20 Round |
| Case | Brass, reloadable |
| Primer | Boxer |
| Corrosive | No |
| G1 Ballistic Coefficient | 0.756 |
| G7 Ballistic Coefficient | 0.356 |
| Velocity Rating | Supersonic |
| Intended use | Range & Target |
| Manufacturer | Winchester |
Winchester Match ammunition is designed for repeatable accuracy across multiple firing sessions. The brass cases accept standard large rifle primers during reloading, and the clean powder formulation minimizes carbon buildup in the chamber and bore. For additional precision rifle loads, browse our full 338 Lapua 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 follow the four rules of firearm safety when handling live ammunition
- Verify current state and local laws regarding ammunition purchase, possession, and storage
- This product contains lead; handle with care and wash hands after contact, especially before eating or smoking
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