This is 40 S&W CCI Blazer 165gr. Total Metal Jacket Ammo. Blazer ammunition delivers the ballistic uniformity, accuracy, reliablity and power of service ammunition, at a substantial savings. The savings is in the case. It's made from a high-strength aluminum alloy, like that used in 30mm anti-tank rounds. Give it a shot—you'll see why law enforcement agencies across America trust their training ammunition needs to Blazer ammunition. This ammo comes packed in 50rd. boxes.