For rifle 308 Cal. I didn't like the idea of built up carbon on the inside of the case , changed to wet tumbling with SS Pins . The brass comes out looking brand new , better for the dies , easier to size and seat . I do take time preping my brass . Fired brass I first pop the primer with a universal deprimer, , wet tumble , air dry and size , I also lube the inside of the necks , full size with the expander leaving the expander shaft with alittle wiggle to self center pulling through the case neck , back in the tumbler to remove lube . I trim and chamfer every time to have all cases the same length . Size to .0015 to .002 headspace using the Redding Competition shellholder set of 5 . Lubing the inside of case necks with dry lube or not didn't make a difference , was alittle smoother when seating though but not much . When testing group size like above post on a 10 shot group. Was the rifle cleaned before the following 10 shot group ? Some rifles shoot tighter as barrel fouls. I do prefer like new brass , will never go back to dry after 30 years of reloading under my belt. Pick what works best for you. Hope I Helped in some way.
Chris