It's a 30-06. I bought it when I was 15 back in 1976, it took me so long to save for it that I decided to get a bolt action 30-06. That way I would be sure to have enough rifle should I get a chance to hunt something other than Pennsylvania deer. Although I still haven't had an opportunity to hunt elk or mule deer I never regretted my choice. Thirty three years later I just bought the Marlin 336 that I really wanted.