Underwood 458 Socom 350gr Fmj - 20rd 10bx/cs

The Underwood 458 SOCOM 350gr FMJ ammunition is purpose-built for AR-15 shooters and tactical operators who demand serious stopping power in a modern sporting rifle platform. Chambered in .458 SOCOM, this cartridge fills a critical niche between standard intermediate rifle rounds and full-power rifle calibers, delivering the ballistic performance required for hunting medium to large game, home defense, and specialized tactical applications. Each case contains 20 rounds packaged in a convenient 10-box master carton for bulk purchasing and long-term storage.

The 350-grain full metal jacket projectile exits the muzzle at 1,650 feet per second, generating substantial kinetic energy and penetration characteristics that exceed traditional 5.56 NATO or 7.62x39 offerings. Full metal jacket construction ensures reliable feeding through AR-15 platforms, consistent chamber behavior, and reduced fouling compared to softer bullet designs—critical factors for magazine-fed semi-automatic operation. The heavier grain weight maximizes sectional density, enabling deeper penetration through barriers and intermediate obstacles while maintaining velocity degradation that remains ballistically effective beyond 200 yards for most tactical scenarios.

This ammunition is ideal for AR-15 owners who have invested in .458 SOCOM uppers or dedicated rifles, as well as law enforcement and private security teams evaluating specialized rifle cartridges for specific mission profiles. The 350gr FMJ load performs best from barrels with appropriate twist rates (typically 1:12 or faster) and requires AR-15 magazines designed for .458 SOCOM to ensure reliable feeding. When stocked in bulk quantities of 200 rounds (10 boxes of 20), this ammunition provides cost-effective practice, training, and duty-ready reserves for serious shooters who understand the ballistic advantages of the SOCOM platform.