Produces a very loud down range boom when launched. It is an excellent wildlife signaling round. Much louder than 12 Ga. Bird bombs. Complete rounds ready to launch. Loaded in CNC machined aluminum casing with powder bushings. Fully re-loadable with our 37MM Reloading  Kits.  With each 3 Round Pack you receive loaded rounds and 3 re-loadable casings which are $20.00 each, a $60.00 value per Ammo Pack. Made in U.S.A..