Brass and cartridges are available from internet sources, (google 303 savage). Chamber pressures are mild so reloaded brass should last a long time. You can load cast bullets for short range small game loads and cheap practice. Jacketed .308 bullets for larger game. It was developed by Savage to compete with the .30-30., popular at the time. Even though it's called the .303, it takes .308 cal. bullets. A bit of marketing from Savage I suspect.