Since I don't have a .270 Win. (and have no plans to get one), I've never converted .30-06 brass to .270...
However, I have converted .30-06 brass to .308 Win., 8x57mm Mauser, 7x57mm Mauser and to 7.65x53mm Mauser...
And, since I do have a number of .30-06 rifles, I have converted a fair...