This is 12 Gauge Centurion Law Enforcement 2 3/4" Multi-Defense Buckshot. Centurion Multi-Defense Buckshot provides a shell with unique characteristics. It is loaded with a combination of one .650" (65 cal.) round ball and six #1 buckshot pellets, this specialized shotshell offers a shell for extreme defensive situations. Its round ball provides maximum penetration and knockdown power and its buckshot increases target impact points. This is the best dual load buckshot on the market today. It comes packed in 10rd. boxes, 250rds. per case.