Talus, I hear you. I'm done.
Here are a few notes for those interested. Seating depth does matter and contrary to campfire lore "kissing" and rocking on isn't always the answer.
I tried three seating depths; .003 into the lands, .015 off, .040 off. The further away the better it got.
.040 off is the groups above.
.015 off is the pic below.
.003 into the lands (kissing) is the pic below.