Berger Target 6mm Caliber 68 Grain Flat Base Rifle Bullets 1000 Bullet. This bullet jacket manufactured by the experts at Berger is made with a Total Indicated Runout (TIR)factory tolerance of +/- .0001. The Berger 6mm 68 grain Flat Base Reloading Bullets features a unique boat tail design that initiates expansion upon impact and maintains pressure until the very last possible moment. The Berger 6mm 68 grain J4 Precision Jacket Bullets are incredibly easy to use and highly recommended for any skill level. Specifications for Berger Target 6mm Caliber 68 Grain Flat Base Rifle Bullets: Manufacturer: Berger Gun Type: Rifle Bullet Type: Flat Base (FB) Bullet Weight: 68 grain Projectile Caliber: .243 Caliber Jacket Material: J4 Target Jacket Country of Origin: USA Fabric/Material: Copper Package Contents: Berger Target 6mm Caliber 68 Grain Flat Base Reloading Rifle Bullets Berger 24711: 6mm 68 gr FB Target 1000 Pk