I run 38mm tires at about 38 psi front, and 42 back. If the route was particularly rocky, I might even drop a couple more psi. I ride these pressures on paved, too, and plenty quick for me.
Tubeless 700x40 MSO 40psi.......42 psi will blow them off the rim. can run lower than 40, rarely do though
Tubeless Bruce Gordon Rock n Roads.......same......anything over 40psi seems to be a time bomb ............not really sure why, but ive dealt with it enough to stop when the pump reads 38-40
I have been using Clemant MSO 700x40 and USH 700x35. I ride a mix of dirt roads and pavement (the more dirt the better) and weigh about 165lbs.
The MSOs I run 38psi in the rear and 36psi up front (easily could go lower but with pavement I like the firmness). The USHs I run 42 in the rear and 40 up front.
I am not super scientific and I am not sure how accurate my gauge is on my pump but those are the numbers.