The Sig Sauer Elite Performance .308 Winchester 175-grain Sierra MatchKing Open Tip Match (OTM) Brass 20-round box is an elite centerfire rifle cartridge engineered specifically for long-range target marksmanship, Precision Rifle Series (PRS) competition, and ballistic validation across variable environmental conditions. A primary friction point in .308 Winchester platforms when shooting at extended ranges is maintaining velocity stability through transonic flight transitions, which frequently causes projectile tumbling, wind deflection, and vertical group stringing. Sig Sauer resolves these accuracy constraints by pairing its precision-drawn reloadable match brass cases with the world-renowned 175-grain Sierra MatchKing HPBT bullet, delivering sub-MOA consistency, minimal velocity spread, and predictable holdovers at distance.
The primary technical advantage centers on the legendary Sierra MatchKing Open Tip Match projectile paired with a 0.505 G1 ballistic coefficient and a 0.264 sectional density. Built with a drawn copper jacket of uniform thickness, a small open-tip meplat, and a precision-engineered boat-tail base, the MatchKing geometry optimizes laminar airflow to minimize aerodynamic drag and resist crosswind deflection. The concentric lead core eliminates internal rotational mass imbalances, ensuring gyroscopic stability through long-range flight paths and transonic transitions.
Launching its heavy 175-grain match bullet at 2,600 FPS, this Elite Performance Match loading utilizes temperature-stable powders and non-corrosive match primers to ensure tight standard deviations and uniform chamber pressure curves across thermal extremes. Assembled using premium reloadable match-grade brass cases with controlled neck tension, it guarantees reliable feeding, uniform ignition, and smooth extraction in both precision bolt-action rifles and gas-operated semi-automatic MSR/AR-10 competition platforms. It is a top-tier choice for competitive marksmen and precision rifle practitioners.
Key Benefits
- Sierra MatchKing 175gr OTM Bullet: World-standard open-tip match design delivers sub-MOA precision and rotational balance.
- High 0.505 G1 Ballistic Coefficient: Streamlined boat-tail profile minimizes drag, flattens drop, and resists wind drift through transonic flight.
- Temperature-Stable Propellant: Formulated to minimize velocity variance across hot and cold environmental extremes.
- Precision Match Brass: Premium virgin brass cases with uniform neck tension ensure repeatable ignition, smooth feeding, and long reloadable life.
Technical Specification
- Ballistics: .308 Winchester (.308 Win / 7.62x51mm Match Compatible) | 2,600 FPS Muzzle Velocity | 0.505 G1 Ballistic Coefficient | 0.264 Sectional Density
- Projectile: 175 Grain | Sierra® MatchKing® | Open Tip Match (OTM) / HPBT | Small Meplat | Concentric Lead Core
- Case/Primer: Precision-Drawn Virgin Reloadable Match Brass Case | Non-Corrosive Match Boxer Primed
- Logistics: 20 Rounds Per Box | Sig Sauer Elite Performance Match Series
- Dimensions: Standard .308 Win Geometry | Precision Bolt-Action & AR-10 Compatible | SKU: E308M2
- Application: Long-Range Target Marksmanship, PRS Competition, Precision Rifle Practice, and Ballistic Validation
- Standards: SAAMI Compliant | Sig Sauer Factory Quality Control Benchmarks
When consistency at distance is the requirement, this load provides a controlled ballistic solution built around proven projectile geometry and stable internal ballistics. Secure verified match-grade .308 Win ammunition from SMKW, where precision shooters source dependable performance.
