Sierra has announced their GameChanger loaded ammunition topped with the polymer-tipped boattail GameChanger bullet essentially a Tipped GameKing. The brass casings have the Sierra headstamp. GameChanger is an excellent choice for an all-around performer in the field. – Caliber: 300 Blackout – Bullet Type: Tipped GameKing – Bullet Weight: 125 gr – Rounds Per Box: 20