Quick view Hornady Hornady Subsonic, Horn 80877 Subsonic 300bo 190 Subx $43.95 $29.62 Hornady subsonic ammunition is designed for accuracy and performance below the speed of sound.It features a sub-x (subsonic- expanding) bullet with a lead core.The long grooves in its gilding metal jacket combine with the bullet's flat profile and the... Compare Add to Cart