Barnes TAC-TX .22 Caliber Rifle Bullets 70 Grain Boat Tail 50 Bullets. AR's feature shorter carbine length barrels which reduce the muzzle velocity when compared to a standard barrel length. To achieve the same terminal performance that Barnes fans are used to we added a larger tip to allow more fluid to enter the nose and modified the bullet cavity to maximize expansion at lower velocities. These bullets track straighter through barriers and have better weight retention than lead-core bullets. Specifications for Barnes TAC-TX .22 Caliber Rifle Bullets 70 Grain Boat Tail: Manufacturer: Barnes Gun Type: Rifle Bullet Type: Boat Tail (BT) Bullet Weight: 70 grain Projectile Caliber: .22 Caliber Diameter: 0.224 in G1 Ballistic Coefficient: 0.432 G7 Ballistic Coefficient: 0.211 Core Material: Copper Bullet Quantity: 50 Bullet Primer Style: Centerfire Case Material: Copper Number of Rounds: 50 Package Contents: Barnes TAC-TX .22 Caliber Rifle Bullets 70 Grain Boat Tail Barnes 32469: TAC-TX .22 Caliber Rifle Bullets 70 Grain Boat Tail 50 Bullets