Hi
I think the 270 case is a touch longer than the 06"s... My 30-06's go all the way down to 22-06's. You can go down in steps 30...7mm...6.5mm. I 'LOVE' Imperial Sizing Die Wax It makes the world a lot easier. For a joke I made a friend a 7mm Mag. case necked to 17, also made him a 20 on the 7 mag case.
jim