RE: What size cartridge for.308?
Since your range is so close I would use a Round Nose bullet, but as far as I can see the only round nose I can find at this time is a 180 gr. Norma 180 gr. Alaska loaded by Norma. If you can' t find the Norma 180 gr. Alaska, I would go with a 180 gr. Soft Point. Good luck.