I am not sure how I can verify that the rear action pillar actually touches the aluminum below, and didn't learn much by trying a bit of Play-Doh in there to see if that would squeeze out and give me a ballpark measurement.
I was thinking of sanding off a bit of the area that supports the side and rear of the action, as the action has obviously compressed the textured black paint. This should allow the rear action pillar to rest on the aluminum below.
I was then going to bed the front lug and the sides, but not bed the rear pillar area itself.
Has anyone ever done a 6 lug rifle?