Brenneke usa 12ga ko 1oz 2-3/4" slug 5rd 50bx/cs FEATURES-12 gauge-2 3/4" shell length-1 oz-437 grains-Lead point with ribs that point to the right ensure smooth choke passage-offers 58% more frontal area than standard .50 cal slugs-Expansion up to .9" upon penetration-Muzzle Velocity:1650 FPS Other Features: Used in smooth or rifled bbls, outstanding energy and knock down power