Shop PSA's wide variety of rifle ammunition for every shooting application from hunting to range/target rounds! Winchester Super Suppressed .300 Blackout 200 grain rifle ammo is optimized specifically for supressor use, delivering quiet, clean, and reliable performance in both suppressed and non-suppressed firearms. With reduced noice subsonic technology, velocities stay below the speed of sound; therefore, decreasing the intensity of sound. For consistent accuracy and reliability, choose Winchester Super Supressed ammunition for your target and range shooting needs.