Speer Grand Slam .264 in 140 Grain Speer Rifle Bullet 50 Round. On impact internal jacket flutes allow consistent expansion yet the bullet retains most of its weight for deep penetration every time. Specifications for Speer Grand Slam .264 in 140 Grain Speer Rifle Bullet 50 Round: Manufacturer: Speer Bullet Type: Soft Point (SP) Bullet Weight: 140 grain Projectile Caliber: .264 Caliber Core Material: Lead Bullet Quantity: 50 Bullet Package Contents: Speer Grand Slam .264 in 140 Grain Speer Rifle Bullet 50 Round Speer 1444A: Grand Slam .264 in 140 Grain Speer Rifle Bullet 50 Round