Hornady MonoFlex .30 caliber/.30-30 Win .308 diameter 140 gr MFLX - 50/count bullets are designed with two unique technologies that provide exceptional accuracy. The bullet lever offers serious hunters a high-quality bullet capable of holding together even under the toughest circumstances. In addition these bullets have the ability to retain 95 percent of their original weight. Another feature of this bullet is gliding metal which is tougher and harder while not increasing pressure or fouling. For midrange to long-range hunting and shooting these bullets product deep penetration. They also are deemed safe for tubular magazines and other types of firearms.