Topic starter wants a pressure to fill , wich is not to low untill he has weighed.
And the lineair calculation I gave and Beenthere, is sufucient for that . Diference is the 10% I add for reserve for unequall load R/L .
Loadcapacitylists come to lower pressure, and the vehiclemaker also read back GAWR in those lists.
And all the needed data can be found on the vehicle. Tiredata on sidewall and GAWR's mostly on same plate as the pressure advices.
So TS dont need to find lists, only needs a calculator.
And the official American lists give to low pressure to laws of nature in the lower pressures, lineair calc to high. Never unsave for the tires.
TS once you weighed, give all the needed data here, and I will put it in my made calculator wich uses an extra safe formula and standard ads the 10% reserve for unequall load R/L .
Then you have a an advice that wont overheat your tires and comfort and gripp is still acceptable.
The prelimanary lineair calc can give some discomfort because the real loads ar probably lower then GAWR's.