Sierra GameChanger Ammunition 300 Winchester Magnum 180 Grain Tipped GameKing Box of 20

CAD $107.44

Introduced in 1963, the 300 Winchester Magnum used the same case length as the rest of the Winchester Magnum family, although the shoulder was moved forward to allow greater powder capacity. This increased capacity made it one of the most potent commercial 30 caliber magnum capable of use in a standard (30-06 length) action. The 300 Winchester Magnum is primarily a hunting cartridge, but has enjoyed considerable success as a 1,000 yard target round. As a big game cartridge, it is ample for any North American big game species. With its flat trajectory, it is well suited to the long-range shooting conditions frequently encountered in western big game hunting.


The Sierra GameChanger hunting bullet is the perfect combination of Sierra’s legendary match accuracy coupled with deadly penetration. Sierra re-engineered their legendary MatchKing bullet into a hollow point design for quick expansion and fitted it with a transparent green tip for ballistic uniformity. Inside, the GameChanger features a unique construction that utilizes a special lead alloy surrounded by a tough copper jacket that delivers excellent penetration and expansion at a variety of ranges. It’s a GameChanger on any hunt! This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.



  • Optimal jacket wall thickness controls expansion and retains weight
  • Open pocket under the polymer tip expands lead core instantly on impact
  • Tuned ogive for industry-leading BC
  • Boat tail design for stable flight and accuracy

CAD $107.44

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Product Information

Cartridge 300 Winchester Magnum
Grain Weight 180 Grains
Quantity 20 Round
Muzzle Velocity 2800 Feet Per Second
Muzzle Energy 2872 Foot Pounds
Bullet Style Polymer Tip
Bullet Brand And Model Sierra GameChanger
Lead Free No
Case Type Brass
Primer Boxer
Corrosive No
Reloadable Yes
G1 Ballistic Coefficient 0.515
Test Barrel Length 24 Inches
Velocity Rating Supersonic
Country of Origin United States of America

Delivery Information

Shipping Weight 1.525 Pounds
DOT-Regulated Yes