I started running it thru a .270 die first. There would be a wrinkle around the base of the neck the .25-06 die would remove. Eventually, I began skipping the .270 die step. Works just fine that way. Have to trim necks, usuallyCan't you resize 30-06 brass? I had a friend who did it, don't know if he did it in one step or ran a 270 die first.