The Nosler Trophy Grade .308 Winchester 165-grain Partition Spitzer Flat Base 20-round box is a premier centerfire rifle cartridge engineered specifically for medium- to large-game hunting, elk pursuit, whitetail management, and black bear hunting. A primary failure point when shooting standard cup-and-core soft point ammunition is core-jacket separation or premature fragmentation when striking heavy shoulder bone, which severely limits penetration depth and creates shallow wound channels. Nosler resolves these terminal limitations by utilizing its legendary dual-core Partition bullet technology, which mechanically preserves the rear lead core to drive deep through heavy tissue and bone regardless of impact velocity.
The primary technical advantage centers on Nosler's 165-grain Partition Spitzer bullet design. Featuring an integral solid copper alloy web, the bullet body is divided into two distinct lead cores. Upon impact, the fully exposed front lead core expands rapidly under hydraulic pressure to deliver massive kinetic energy transfer, while the internal copper partition prevents expansion from continuing into the rear section. The fully enclosed rear lead core retains its structural mass and momentum, ensuring deep penetration, straight-line tracking through vital organs, and reliable exit wounds across variable shot angles.
Launching its 165-grain Partition Spitzer projectile at a factory-rated 2,750 FPS muzzle velocity, this Trophy Grade loading optimizes standard .308 Winchester twist rates to deliver flat trajectories and a 0.410 G1 ballistic coefficient. Assembled using custom-prepped Nosler virgin brass cases—chamfered, deburred, and weight-sorted for consistent internal volume—alongside clean-burning powders and non-corrosive Boxer primers, the cartridge guarantees uniform chamber pressure curves and reliable extraction across bolt-action and semi-automatic platforms. It serves as an elite, field-proven choice for big game hunters worldwide.
Key Benefits
- Dual-Core Partition Bullet: Integral copper web locks the rear lead core in place to guarantee high weight retention and deep penetration.
- Rapid Front-Core Expansion: Exposed forward core deforms predictably to maximize shock and energy dump in vital organs.
- Match-Prepped Nosler Brass: Premium cases feature inspected flash holes, uniform neck tension, and consistent volume for tight velocity tolerances.
- 2,750 FPS Muzzle Velocity: Delivers manageable drop and hard-hitting downrange energy for medium and large game hunting.
Technical Specification
- Ballistics: .308 Winchester | 2,750 FPS Muzzle Velocity | 0.410 G1 Ballistic Coefficient
- Projectile: 165 Grain | Partition Spitzer | Flat Base (FB) | Dual Lead Cores | Internal Copper Alloy Web
- Case/Primer: Precision Prepped Virgin Nosler Brass | Clean-Burning Powder | Non-Corrosive Boxer Primed
- Logistics: 20 Rounds Per Box | Nosler Trophy Grade Series
- Dimensions: Standard .308 Win Geometry | Short-Action Compatible | SKU: 60053
- Application: Big Game Hunting, Whitetail Deer, Mule Deer, Elk, Black Bear, and African Antelope
- Standards: SAAMI Compliant | Nosler Factory Quality Control Benchmarks
If you’re running a .308 Win platform and need predictable penetration through heavy bone without sacrificing expansion, this load provides a mechanically proven solution backed by consistent manufacturing—available now from SMKW, a trusted source for field-ready ammunition.
