25 rds. Remington HyperSonic Steel 12 Gauge Shotgun Ammo. Impressive 2-stage ignition technology safely accelerates your shot to HyperSonic speed. Patented Xelerator wad delivers tighter down-range motion, too, for reliable accuracy, time after time.Shell Length: 3"Shot Weight: 1 1/8 oz.Shot Size: BB, 2, 425 roundsState Shot Size, as available in the Shopping Cart.