30-06. I have always shot 150 gr bullets through it, however, from what I'm reading 165 gr may actually give better performance and something I will consider. This rifle is pretty much in retirement as I have enjoyed the Savage 99's lately. The next one to try is a pre 64 Win 88 in 308 which just got a Redfield 3x9x40 on it tonight. If the idea of a pump rifle meets your needs the Remington 760, 7600 are really well built. I don't know anything about the new models or what they are numbered by.