Can anybody identify this shotgun round? It's an all red plastic 2 3/4" 12 gauge shotgun round with no metal around the primer. the only markings read 12-Activ (That's how it is spelled). When it is fired, there is no kick, like a blank. It fires a small projectile about 30 yards out which subsequently explodes with a loud bang and a large puff of smoke. It was with some old ammo my Grandpa had. Said he got it about 10 years ago from someone. Thanks gentlemen.