HSM‘s .300 Weatherby Magnum ammunition (brand part no. 300WBY-19-N) loads a 200-grain Sierra GameKing bullet for hunters who want proven bullet performance behind a genuinely powerful magnum case. HSM builds much of its hunting lineup around established, branded third-party bullets rather than in-house designs, and the GameKing is one of Sierra’s most established hunting profiles, with an exposed lead tip that mushrooms open on impact for controlled, dependable expansion. The boat tail base cuts drag, helping the bullet hold velocity and a flatter trajectory at the extended ranges .300 Weatherby Magnum is built to reach. For .300 Weatherby Magnum hunters who want a proven bullet in a serious case, this rifle ammunition is built for the field.

Key Specifications

• The chambering is .300 Weatherby Magnum, one of the most powerful production .30-caliber cartridges made.
• The bullet weighs 200 grains, a heavy-for-caliber weight built for big-game hunting.
• The bullet is a Sierra GameKing, a proven, widely used hunting bullet.
• The exposed lead tip mushrooms open on impact, giving controlled, dependable expansion on game.
• The GameKing’s boat tail base reduces drag, helping hold velocity and a flatter trajectory at extended range.
• Cost runs about $3.75 per round, in line with premium magnum big-game ammunition.
• Each box holds 20 rounds, enough to confirm zero and still hunt the season.
• The retail box measures about 6.15 inches, a compact package for shelf or safe storage.
• HSM builds this load around established, branded hunting bullets rather than an in-house design.

Frequently Asked Questions

What game is the 200gr GameKing suited for? Its weight and controlled expansion make it a strong choice for elk-class and other large big game at .300 Weatherby Magnum’s extended ranges.

Why does HSM load a Sierra bullet instead of its own? HSM builds much of its hunting lineup around established, proven third-party bullets like the GameKing rather than developing its own from scratch.

What does the boat tail base do? It reduces aerodynamic drag, helping the bullet retain velocity and a flatter trajectory at the long ranges .300 Weatherby Magnum is built to reach.

Buy HSM .300 Weatherby Magnum 200gr Sierra GameKing

A magnum case this powerful deserves a bullet with a real track record behind it, and the GameKing has been earning that reputation for decades. Order from our Lubbock, Texas gun shop and it ships fast to your door.