I only need to use a small base die on 308 and only for my ar10 witch is the springfield. I guess it has a tight chamber.
I do my brass prep on a progressive just using two dies, the normal Lee FL size deacpper followed by a RCBS small bars die. I use the homemade brass lube, 1:10 lanolin and 99‰ alcohol.
Then I tumble, primer pocket, trim and load