Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
Shop Black Hills 300 Winchester Magnum ammo, loaded with a 190-grain jacketed hollow point bullet and molybdenum coating. This cartridge generates 2950 feet per second at the muzzle and delivers 3672 foot-pounds of energy — a combination that extends effective range and maintains terminal performance downrange. The 300 Winchester Magnum was introduced in 1963 as a belted magnum cartridge for bolt-action rifles, and today it serves both long-range precision shooters and hunters pursuing elk, moose, and bear at distances beyond 400 yards. Black Hills manufactures this ammunition using Boxer-primed brass cases, which accept standard large rifle primers and tolerate repeated sizing, trimming, and reloading without case-head separation or primer-pocket expansion.
Built for the Box
Black Hills builds this load around a 190-grain jacketed hollow point bullet with a molybdenum disulfide coating. Moly reduces copper fouling in the bore, extends barrel life under high round counts, and lowers friction during engraving — a practical consideration when you run multi-stage matches or extended practice strings. The hollow point cavity expands predictably at magnum velocities, and the jacket thickness balances penetration with controlled expansion. Each case receives a non-corrosive Boxer primer seated to military specifications, and Black Hills measures powder charges by weight rather than volume to hold velocity spreads within 20–30 fps across the production lot. You get twenty rounds per box, packaged in a cardboard tray that stacks cleanly in an ammo can.
Specs at a Glance
| Spec | Value |
|---|---|
| Caliber | 300 Winchester Magnum |
| Bullet weight | 190 Grains |
| Bullet type | Jacketed Hollow Point |
| Muzzle velocity | 2950 Feet Per Second |
| Muzzle energy | 3672 Foot Pounds |
| Rounds/box | 20 Round |
| Case | Brass |
| Primer | Boxer |
| Corrosive | No |
| Intended use | Range & Target |
| Manufacturer | Black Hills |
This load ships from Black Hills with non-corrosive components and reloadable brass — you can resize, re-prime, and re-charge each case five to eight times before reaching the end of case life. Browse our full selection of 300 Win Mag ammo for additional bullet weights, velocities, and manufacturers matched to your rifle and use case.
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.
- Observe the four rules of firearms safety at all times: treat every firearm as loaded, never point at anything you do not intend to shoot, keep your finger off the trigger until ready, and know your target and what lies beyond.
- Verify current state and local laws governing ammunition purchase, possession, and use — some jurisdictions restrict hollow-point projectiles or impose storage requirements.
- This product can expose you to lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling ammunition and components. For more information visit www.P65Warnings.ca.gov.
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