These 12-gauge rounds belong to Winchester's Military line of ammunition. Each shell measures 2 3/4 inches long and is loaded with size #00 buckshot. Simply put these shotshells pack an impressive punch and they come in a 5-piece box for easy carry. If you are looking for a high-quality military-grade round look no further than Winchester's Military line of ammunition. If Winchester's 140 years of experience isn't enough to convince you consider that these rounds are loaded with the same type of buckshot carried by the U.S. military.