Hornady Sub-X Bullets 30 Cal .308 190 Gr Sub-XSub-X® (Subsonic — eXpanding) bullets deliver big results without a big bang! Designed to provide deep penetration below the speed of sound, Sub-X® features a lead core. Long grooves in its gilding metal jacket combine with its flat profile and the patented Flex Tip® insert within the bullet’s hollowpoint cavity to help it expand reliably at low velocities. Cannelures provide positive case crimp, making Sub-X® ideal for semiautomatic weapons.EXPANDS AT SUBSONIC VELOCITIESPatented Flex Tip® technology aids in expansion at velocities as low as 900 fps.PROVEN PERFORMANCEMeets FBI protocol for terminal ballistic test requirements.POSITIVE CASE CRIMPLead core bullet with cannelured jacket provides positive case crimp for use in semiautomatics.WIDE RANGE OF GUNSDesigned to fit, feed and function in a variety of firearms, including gas system guns.