Last reviewed: 2026-04-17 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
Federal Premium 308 Winchester ammunition loaded with the 150-grain Barnes Triple-Shock X bullet represents a definitive solution for hunters operating in lead-free zones or seeking maximum terminal performance on medium to large game. The Barnes TSX is a monolithic solid copper hollow point that expands into four cutting petals upon impact, creating permanent wound channels while driving deep through heavy muscle and bone. At 2820 feet per second muzzle velocity and 2648 foot-pounds of energy, this load delivers flat trajectory and reliable expansion from 50 to 300 yards. Federal Premium pairs the TSX projectile with select powders and nickel-plated brass cases, ensuring consistent ignition and feeding in bolt-action and semi-automatic rifles. Each round is Boxer-primed and reloadable, with a G1 ballistic coefficient of 0.369 and sectional density of 0.226.
Built for the Box
Federal Premium manufactures this ammunition using 100% copper Barnes Triple-Shock X bullets — no lead core, no fragmentation, no weight loss. The solid copper construction allows the bullet to expand to approximately 1.5 times its original diameter, forming four sharp-edged petals that cut through tissue while the remaining shank drives forward. This design typically retains 100% of the bullet’s starting weight, a critical advantage when shooting through heavy shoulder bones or dense muscle on elk, deer, hogs, and black bear. The nickel-plated case resists corrosion and cycles smoothly through magazine-fed actions. Federal Premium sources brass, primers, and propellants in-house, controlling every variable from powder charge to crimp tension.
The Numbers
| Spec | Value |
|---|---|
| Caliber | 308 Winchester |
| Bullet weight | 150 Grains |
| Bullet type | Barnes Triple-Shock X Solid Hollow Point |
| Muzzle velocity | 2820 Feet Per Second |
| Muzzle energy | 2648 Foot Pounds |
| Rounds/box | 20 Round |
| Case | Nickel Plated |
| Primer | Boxer |
| Corrosive | No |
| Lead Free | Yes |
| Reloadable | Yes |
| G1 Ballistic Coefficient | 0.369 |
| Sectional Density | 0.226 |
| Intended use | Hunting |
| Manufacturer | Federal Premium |
This load is certified by the State of California for compliance with the California Lead-Free Ban and meets the criteria under the Condor Preservation Act, making it legal for hunting in condor range and other restricted zones. The nickel-plated cases resist tarnish and feed reliably in semi-automatic platforms, while the Boxer primer allows straightforward decapping and resizing for handloaders. For additional Federal 308 ammo options, including match and defensive loads, see our full catalog.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition cannot be shipped to certain states, counties, and cities — review our ammunition shipping restrictions before ordering. Store ammunition in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Observe the four universal firearm safety rules: treat every firearm as loaded, never point at anything you are not willing to destroy, keep your finger off the trigger until ready to fire, and know your target and what lies beyond it.
- Verify that your rifle is chambered for 308 Winchester before loading. Consult your firearm’s owner’s manual for maximum chamber pressure and recommended bullet weights.
- This ammunition contains copper components. Follow manufacturer guidelines for barrel cleaning after shooting monolithic copper bullets to prevent fouling buildup.
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