Description
The HSM Game King .300 Winchester Magnum is straightforward hunting ammunition built on one principle: match quality components to a quality bullet so everything works together as intended. You're getting Sierra GameKing spitzer boat tail projectiles paired with brass cases and primers that HSM has specifically chosen for this caliber. The result feels more like carefully handloaded ammunition than factory rounds.
Proven Design for Serious Hunting
The 180-grain Sierra GameKing has a long track record with hunters who take large game seriously. This weight sits right in the sweet spot for the .300 Win Mag, delivering the flat trajectory you want from a magnum without excessive recoil. The bullet's design emphasizes consistent expansion and penetration across typical hunting ranges, whether you're 100 yards or several hundred yards from your target.
Built to Last and Reload
You'll get 20 rounds of reloadable brass per box, which makes sense if you're serious about precision hunting. The consistent case quality means your reloads will be more uniform, and that matters when you're counting on accuracy in the field. HSM has been making ammunition since 1968 and earned a reputation supplying military and law enforcement with dependable rounds. That same attention to consistency shows up in their commercial hunting loads.
What You're Actually Getting
This isn't marketing hype. Each box contains 20 rounds assembled with components matched to Sierra's specifications. The boat tail design improves ballistic performance, while the spitzer point keeps velocity and energy downrange where you need it. Whether you're hunting mule deer in the high country or elk in timber, the Game King gives you ammunition that's ready to perform without fussing around with handloading first.
Key Specifications
- Caliber: .300 Winchester Magnum
- Bullet Weight: 180 grains
- Bullet Type: Sierra GameKing Spitzer Boat Tail (SBT)
- Muzzle Velocity: 3074 fps
- Case Type: Brass (reloadable)
- Rounds Per Box: 20
- Primer Type: Centerfire
- Manufacturer: HSM Ammunition
- Manufacturer Part Number: 300WINMAG41N
- UPC: 810742023096
- Application: Big game hunting
- Cartridge Length: 6.15"
What’s Included
- 20 rounds of .300 Winchester Magnum ammunition
Frequently Asked Questions
Is the HSM Game King suitable for elk hunting?
Yes. The 180-grain GameKing in .300 Win Mag has the velocity and bullet performance needed for elk and other large game. The Sierra GameKing bullet is designed for controlled expansion at hunting distances, making it well-suited for magnum game applications.
Can I reload the brass from these cartridges?
Yes. The cases are standard reloadable brass, and that's a key feature of this load. Reloaders appreciate HSM ammunition for the case consistency, which helps your handloads shoot more uniformly.
How does the Sierra GameKing bullet compare to newer hunting bullets?
The GameKing is a proven, traditional hunting bullet that prioritizes controlled expansion and reliable penetration over long-distance ballistics. It works well for typical hunting ranges and has decades of field results backing its performance.
What's the actual accuracy potential of this ammunition?
HSM's Game King line is assembled with matched components to deliver consistent accuracy. Real-world performance varies by rifle, but the carefully selected primers, powder, and bullets mean this ammunition is more precise than standard factory loads.





Reviews
There are no reviews yet.