Winchester Ammo Centerfire Handgun Reloading 9mm .355 124 Gr Full Metal Jacket (FMJ) 500 Per Box Bullets Are Custom-Designed And manufactured To Precise specifications To Deliver Specific On-Target Performance characteristics. These characteristics Vary depending On Bullet Design. Winchester carries a Variety Of Component Bullets For Both Centerfire Rifle And Handgun Ammunition. Bullet Type: Full Metal Jacket (FMJ) Bullet Diameter: .355 Weight: 124 Gr Jacket Material: Copper Core Material: Lead Quantity: 500 Per Box