.30-06 in 180gr. I have a .30-06 1903A3 Remington Springfield rifle that my dad bought when he was 18, and gave to me when I was 14. To all potential questions; I do still use it; and its a 'Remington' Springfield since during WWII other manufacturers were given the rights to produce the rifles- and mine was manufactured by Remington(likely in 1942). .270's just don't give you the options in the bullet weight department that the ol' ott-six does