This is a Winchester Ammunition Shotshell known as the Double X chambered in 20 Gauge 3", model X203XCT5.
Double X Ammunition provides ultimate high-velocity" knock-down performance in the field. With copper plated lead shot for consistent" tighter patterns" Double X has been trusted by generations of hunters who demand quality and consistency.
Features:
20 Gauge
1,185 Feet per second
3 Inch
1-1/4 Ounce #5 copper plated lead shot
10 Rounds per box