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.Specifications: 6.5 creedmoor 140 gr sierra tipped gameking (tgk) 20 per box/10 csCaliber: 6.5 CreedmoorBullet Type: Sierra Tipped GameKing (TGK)Bullet Weight: 140 grRounds Per Box: 20Boxes Per Case: 10Application: HuntingCasing Material: Brass