Winchester Super X 9mm ammunition is designed for reliable home defense. The 147-grain full metal jacket bullets deliver consistent accuracy and performance, ideal for training as well as defensive applications. Specifications: Manufacturer: Winchester Ammo Model: Super X Caliber: 9mm Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 147 grains Rounds Per Box: 50 Boxes Per Case: 10 Casing Material: Brass Application: Home Defense UPC: 020892207127 SKU: X9MMSU2 Box Dimensions: 2.6" W x 5.2" L x 1.5" H Weight per Box: 1.59 lbs