Sierra GameChanger .300 Win Mag 180gr TGK Hunting Ammo 20Rd Box A4680-07

The Sierra GameChanger .300 Winchester Magnum 180-grain Tipped GameKing (TGK) load is a long-range masterpiece engineered for hunters chasing large, tough big game. The classic vulnerability with high-velocity magnum cartridges is that standard bullets can fragment or blow apart if they hit a target at close range, destroying valuable meat and failing to reach the vitals. Sierra completely eliminates this risk by pairing an ultra-aerodynamic profile with a reinforced hunting jacket, delivering flat trajectories and deep, bone-crushing penetration at any distance.

The technical advantage centers on a hybrid design that borrows the legendary ogive geometry of Sierra's world-famous MatchKing target bullet and blends it with rugged hunting construction. Boasting a sleek boat-tail profile and an efficient 0.515 G1 ballistic coefficient, this heavy-hitting projectile slashes mid-flight drag and preserves massive kinetic energy far downrange. On contact, the streamlined tip drives backward into a calibrated internal cavity to trigger immediate, uniform mushrooming, while the jacket controls the expansion to prevent the lead core from separating.

Screaming out of the muzzle at a powerful 2,960 FPS, this 180-grain powerhouse translates raw magnum speed into devastating downrange energy. Because the progressively thickened copper jacket wall mechanically locks the lead core in place, the bullet retains nearly all of its original weight under extreme impact stress. This maximum structural mass allows the expanded bullet to sustain its crushing forward momentum, driving straight and deep through the thickest hide, dense muscle tissue, and heavy shoulder bone of trophy big game.

Key Benefits

• Progressively Thickened Jacket: Heavy-duty copper wall construction prevents fragmentation under high-velocity magnum impacts, ensuring maximum weight retention.
• Sleek TGK Aerodynamics: High-efficiency .0515 G1 ballistic coefficient slashes downrange drag and minimizes crosswind drift over extended distances.
• Mechanical Tip Expansion: Designed to plunge backward into an internal cavity on contact, triggering immediate, uniform downrange mushrooming.
• MatchKing-Derived Heritage: Engineered using Sierra's legendary tournament-winning target geometry to guarantee sub-MOA precision from a factory box.

Technical Specification

• Ballistics: .300 Winchester Magnum | 2,960 FPS Muzzle Velocity | 0.515 G1 Ballistic Coefficient
• Projectile: 180 Grain | Tipped GameKing (TGK) | Reinforced Tapered Copper Jacket & Boat-Tail
• Case/Primer: Premium Brass Case | Boxer Primed | Clean-Burning Propellant | Reloadable
• Logistics: 20 Rounds Per Box | GameChanger Hunting Series
• Dimensions: .300 Win Mag | ~1.20 lbs Per Box | SKU: A4680-07
• Application: Large Big Game Hunting | Elk, Moose, Bear, & Large Deer | Extended-Range Magnum Performance
• Standards: SAAMI Compliant | Sub-MOA Factory Benchrest Tolerances

When precision, penetration, and repeatable ballistic performance matter, trust SMKW to deliver proven Sierra ammunition engineered for demanding hunting environments. Secure your supply today from a retailer committed to verified quality and compliance.