This is 12 Gauge Pit Bull Ammo. This ammo is loaded with a dual load. It has six 00 Buck pellets and a 3/4 Oz. slug. The buckshot shoots out first followed by the slug. This is a great choice for home protection. If the buckshot don't get them, the slug will. This is a really powerful load. It is a 2 3/4" shell and is loaded to the max load. It is safe to shoot in all 12 Gauge shotguns.