SIG Sauer 120gr Elite Copper Duty

SIG Sauer's 120-grain Elite Copper Duty in .300 AAC Blackout represents a purpose-built defensive loading that leverages solid copper construction for maximum weight retention and controlled expansion. Unlike traditional jacketed lead bullets that can shed jacket material on impact, the monolithic copper projectile maintains its structural integrity throughout penetration, delivering consistent terminal performance across a wide range of impact velocities. This makes it particularly effective from the shorter barrels commonly paired with .300 Blackout platforms.

The 120-grain bullet weight strikes an optimal balance between velocity and mass for supersonic .300 Blackout applications. At 2,250 fps from a 16-inch barrel, the load generates 1,350 ft-lbs of muzzle energy while maintaining reliable expansion characteristics. The solid copper design creates a controlled mushroom shape on impact, with petals that remain attached to the base for deep, straight-line penetration. This combination of expansion and penetration makes it well-suited for law enforcement duty use and civilian home defense.

SIG Sauer developed the Elite Copper Duty line specifically for professional applications where barrier performance and consistent terminal ballistics are critical requirements. The ammunition is loaded to consistent velocities with flash-reduced propellant, and the brass cases are precision-manufactured to ensure reliable feeding and extraction across all AR-pattern platforms. For duty and defense applications where lead-free projectiles are preferred or mandated, SIG's Elite Copper Duty provides proven terminal performance.