Find the Correct Tire Inflation Pressure | Toyo Tires
There are tables for this. If you are running LTs you are too low (unsafe). If running P metric you are higher than recommended.
If I recall from the minimum tire load (based on % of GAWR) the p metric in this size should have 32 psi. An LT should have a minimum of 38 PSI. Both are for on road application. Offroad is a different discussion.