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: 223 RemBullet Type: Sierra BlitzKingBullet Weight: 69 grRounds Per Box: 20Boxes Per Case: 10Casing Material: BrassHazair: Yes