You can still get factory ammo for those, or you can easily buy bullets and brass. The .318 bullets are still made by Buffalo bullets, Hawk, Woodleigh, RWS PPU, and a few other European makes. Many of the J were bored out to .323 so they are i fact JS versions. You may want to mike the end of the barrel and verifiy the actual bore diameter before ordering bullets. The ,.323 ones are a lot easier to locate. Nice gun, best of luck with it. They are well known to be very accurate rifles.