20 rounds of FederalPremium 180gr Hydra-Shok jacketed hollow point cartridges in caliber .40 S&W.P40HS1. New old stock - probably 15 years old, stored in cabinet with desiccant. I bought this for my Ruger Police Carbine, sold the carbine, but kept the ammunition. Typical. At least in that case I bought the gun before the ammo. The price is lower than what I would pay for new ammo from the distributor if they had any in stock.