Federal Premium Barnes TSX Winchester 150 Grain Barnes Triple-Shock X Centerfire Rifle Ammo 20 Rounds. One-piece design features a pressurized powder for rapid ignition. Expansion is controlled by the boat tail's large hollow-point tip ensuring consistent large wound cavities even with less-than-perfect accuracy. One-piece design also retains almost 100 percent of its weight. This .30-30 Winchester ammo's grooved bullet shank improves accuracy and allows it to penetrate deeply. The grooved base of the .30-30 cal bullet also improves its ability to expand upon impact. The design of the carrier itself is grooved allowing it to roll or tumble more easily in the magazine. Nearly 100 percent weight retention means nearly 100 percent weight transfer upon impact. The all-copper pressurized case is designed to reduce fouling and its light weight keeps shooting at a high rate without weighing the shooter down. Specifications for Federal Premium Barnes TSX .30-30 Winchester 150 Grain Barnes Triple-Shock X Centerfire Rifle Ammunition: Manufacturer: Federal Caliber: .30-30 Winchester Number of Rounds: 20 Bullet Type: Spitzer Boat Tail (SBT) Bullet Weight: 150 grain Cartridge Case Material: Brass Muzzle Velocity: 2220 ft/s Muzzle Energy: 1641 ft-lbs Application: Medium Game Package Type: Box Primer Style: Centerfire G1 Ballistic Coefficient: 0.184 Lead Free: No Fabric/Material: Copper Features of Federal Premium .30-30 Winchester 150gr. Barnes Triple-Shock X Rifle Ammo - 20 Rounds One-piece copper construction Deep hollow-point tip Grooved bullet shank improves accuracy Almost 100 percent weight retention Deep penetration and large consistent expansion Package Contents: Federal Premium BARNES TSX .30-30 Winchester 150 grain Barnes Triple-Shock X Centerfire Rifle Ammunition What is Federal Premium Barnes TSX .30-30 Winchester 150 Grain Barnes Triple-Shock X Centerfire Rifle Ammunition good for? The manufacturer thinks that it is suitable for medium game.Federal P3030G: Premium Barnes TSX .30-30 Winchester 150 Grain Barnes Triple-Shock X Centerfire Rifle Ammo 20 Rounds