Rifle Ammunition. Remington Green Box: Legendary for accuracy and performance. Cases made of high-grade 70-30 brass featuring Kleenbore primers.Caliber: .260 Rem. Ammo Bullet Weight Grains: 140 Bullet Style: Pointed Soft-Point Core-Lokt Muzzle Velocity (F.P.S.): 2,750 Muzzle Energy (ft.-lbs.): 2,351 Rounds: 20 Order Today!