The Maxim Defense 8.6mm Blackout ammunition is specifically engineered for short barrel rifles (SBRs) with 285 grain copper projectiles and innovative TUI (Tumble Upon Impact) technology. Developed in partnership with Fort Scott Munitions this ammunition delivers superior terminal ballistics optimized for close-quarter encounters.Maxim Defense 8.6mm Blackout Copper Ammunition - 20 rounds285 grain projectile weight for maximum impactTUI (Tumble Upon Impact) technology for enhanced wound cavityTumble performance maintained down to 500 FPSOptimized specifically for short barrel riflesBallistic performance exceeds expanding and fragmenting projectilesThis premium ammunition addresses the velocity and terminal ballistic challenges faced by SBRs making it ideal for tactical applications and close-quarter defensive scenarios where reliable stopping power is essential.