The HSM Game King .300 Winchester Magnum 200 gr Sierra GameKing Spitzer Boat Tail (SBT), 20 Rounds Per Box (300WINMAG14N, UPC 810742020927) is a premium hunting load crafted for serious big game hunters who demand flat trajectories, heavy-hitting energy, and match-grade accuracy from their .300 Win Mag rifles. Combining the renowned Sierra GameKing 200-grain SBT bullet with HSM’s precision loading and quality components, this cartridge is ideal for elk, moose, black bear, and long-range deer hunting where confidence in your shot really matters.
Built Around the Legendary 200 gr Sierra GameKing SBT
At the heart of this load is the 200-grain Sierra GameKing Spitzer Boat Tail—one of the most trusted hunting bullets in the field.
Key bullet benefits:
Spitzer (pointed) profile for a high ballistic coefficient and flat trajectory over long ranges.
Boat tail base reduces drag and helps the bullet retain velocity and energy downrange.
Designed to deliver reliable expansion and deep penetration on medium-to-large game animals when placed correctly.
If you’ve used GameKing bullets before, you already know they’re famous for providing a great balance between accuracy and terminal performance—making them a natural match for a powerhouse like the .300 Win Mag.
.300 Win Mag Power – Long-Range Big Game Performance
The .300 Winchester Magnum has earned its reputation as one of the most versatile and effective long-range hunting cartridges in North America. Pairing it with a 200-grain GameKing makes this HSM load a top contender for:
Elk and moose hunting in open country and timber edges.
Black bear and similar heavy game, where penetration and retained energy matter.
Long-range mule deer or whitetail on big Western landscapes.
With proper rifle zeroing and dope, this load gives you the reach and authority needed when those once-a-season opportunities appear at extended distances.
Match-Grade Accuracy Meets Hunting Reliability
HSM (Hunting Shack Munitions) has built a strong following among precision shooters and hunters for consistent, accurate ammunition. In this Game King series load, they:
Use name-brand Sierra bullets known for tight groups.
Carefully match brass, primers, and powder for consistent velocities.
Load to exacting standards aimed at match-like accuracy in hunting ammo.
The result is a cartridge that not only hits hard, but also shoots true—helping shrink group sizes and build shooter confidence when it counts.
Heavy 200-Grain Bullet for Deep Penetration & High Retained Energy
Compared to lighter .300 Win Mag hunting bullets, the 200 gr GameKing SBT offers:
Higher sectional density, contributing to deep penetration on quartering or larger-bodied game.
Excellent retained energy at extended distances, helping ensure ethical performance when shots are farther than typical woods ranges.
A noticeably solid, steady recoil feel that many experienced magnum shooters prefer for big game work.
If you like your .300 Win Mag to behave like a true heavy-hitter, this is the kind of bullet weight you want to feed it.
Ideal for Western Hunts, Timber Edges & Open Country
Thanks to the combination of efficient bullet design and magnum power, this HSM Game King load excels in:
Open Western terrain, where shots can stretch across canyons or across sage flats.
High-country elk hunting, where you may need to reach across clear-cuts or alpine meadows.
Timber and forest edges, where you still want flat trajectory and heavy impact at mid-range distances.
Zeroed properly and matched to your rifle, this ammo gives you a confidence-inspiring blend of reach, accuracy, and terminal performance on large game.
Premium Components & Quality Manufacturing
HSM builds these Game King .300 Win Mag 200 gr SBT loads using:
High-quality brass cases suitable for multiple reloads (for those who handload).
Reliable primers and carefully selected powders chosen for consistent ignition and burn.
Quality control focused on repeatable performance from round to round.
This attention to detail is what separates serious hunting ammunition from bargain-bin loads—especially when you’re investing time, money, and effort into a big game hunt.
Convenient 20-Round Box – 20 Per Case Listing Note
This load is packaged 20 rounds per box, a standard configuration for premium hunting ammo. The product listing often notes “20 Per Box / 20 Case,” meaning:
For the individual hunter, that means easy-to-carry 20-round boxes that fit perfectly in ammo pouches, packs, or gun room storage.
Great Choice for Sight-In, Practice & the Hunt
When you pick a specific bullet and load for a hunt, it’s smart to:
Sight in and confirm zero with the exact ammo you plan to carry.
Shoot some practice groups and positional drills to verify point of impact and how your rifle behaves under realistic conditions.
Keep a couple of boxes reserved for actual hunting use, so every shot on game comes from a lot your rifle already “knows.”
With HSM’s Game King 200 gr .300 Win Mag load, you can train, refine your long-range holds, and step into the field with one consistent, proven cartridge.
Key Features & Specifications – HSM Game King .300 Win Mag 200 gr GameKing SBT
Brand: HSM (Hunting Shack Munitions)
Series: Game King
Caliber: .300 Winchester Magnum
Bullet Weight: 200 grains
Bullet Type: Sierra GameKing Spitzer Boat Tail (SBT) – premium hunting bullet designed for accuracy and controlled expansion
Case Type: High-quality brass
Muzzle Velocity & Energy: (Varies by barrel length and lot; check HSM/specific packaging for exact data)
Intended Use: Big game hunting – ideal for elk, moose, black bear, and long-range deer when used responsibly and within ethical distances
Packaging: 20 rounds per box
Manufacturer Part Number (MPN): 300WINMAG14N
UPC: 810742020927
If you’re looking for a hard-hitting, long-range hunting load that pairs the proven .300 Win Mag with the legendary 200-grain Sierra GameKing SBT, the HSM Game King 300WINMAG14N (UPC 810742020927) is an outstanding choice—offering premium bullet performance, excellent accuracy, and serious big-game capability in every 20-round box.
The End
