Maybe you missed this part, which you quoted: "and newly formed cases are a .008” crush fit in the chamber for the first firing."
That means cases with the shoulders bumped back from 6.8 SPC, but not fireformed yet. Your chamber was so slick that it did some of the sizing just cycling the action.
That does not mean I was trying to run full power loads on the fireform load; don't take it out of context.
