Hornady Dangerous Game eXpanding Bullets are manufactured by a reputable company and are sold in different calibers diameters and grains according to need. As the name implies these bullets are one of the most efficient and effective in the world for hunting big game. The bullets feature a quality copper jacket along with a flat nose comprised of a high antimony lead core. In addition the design ensures controlled expansion and penetration power deep enough to go through thick bone and tissue. For serious game hunters it is hard to beat what these bullets offer.