In 1873 less than a decade after the Civil War and when Westward expansion was in full gallop Winchester introduced the first successful centerfire cartridges. Winchester has set the world standard in superior ammunition performance and innovation for more than a century. To millions of hunters and shooters worldwide the name Winchester means quality and performance. No matter the sport game or protection you can always depend on the Winchester Ammunition to perform as promised. Features:Positive FunctioningNo ExpansionGood AccuracyNo Barrel LeadingSpecifications:Caliber: 223 Remington/5.56 NATOBullet Type: Full Metal JacketBullet Weight: 62 GRMuzzle Energy: 1323 ft lbsMuzzle Velocity: 3100 fpsRounds Per Box: 20Boxes Per Case: 50Application: Target/CompetitionCasing Material: Brass