I have absolutely NO experience with Dillon rifle dies...but I do 95% of my loading on a Dillon 650, and that includes the "fun" rounds for .308.
However, I have had excellent luck with Lee dies. I use these almost exclusively, and my .308 rounds work well in my bolt action rifles and my M1A.
Have you considered getting a different sizer die? You can buy those separately.
Hiding in plain sight...