This is 12 Gauge Rhodesian Jungle Ammo. This ammo is loaded with BB and OO buckshot. This is the best dual load for home protection. The combination of the BB and Buckshot gives this round a really good pattern. This ammo does alot of damage to its target. It is a 2 3/4" shell and is loaded to a max load. It is safe to shoot in all 12 gauge shotguns.