The rifle in the photo is my PRS rig, in 6mm BRA. I bought a prefit PVA 6.5x47L barrel from Gobig over the winter, that I plan to run in NRL Hunter this year. And I have a IBI barrel on order and gunsmith Larry Brice lined up for a 308win barrel for Worlds this summer. All going on Zeus actions.
I don't think the ring clamp force damages the internals, but it does cause the parallax dial to bind if there is too much pressure in certain spots on the tube. The Spuhr is probably the worst for it due to the span of the ring cap, plus 6 screws per cap, plus how little range of front-back adjustment you have due to the cap span. I recently picked up ARC rings to try, and being much shorter ring span, it's easy to avoid the sensitive spots.