All I know is that a hair undercharged is better than any over... I would have to consult the books to find about pressures...

We are just trying to find the parameters to see if something more basic could be your problem.. very unusual for a TXV valve to be bad out of the box...so these other things are easier to deal with... it can be checked , but I think on the car you have to go with general things like air temp... ac performance .. to test the actual valve you would need specialized equipment and have it off the car....( I could be wrong, only quote me annonamously on that...LOL )

If , since this is a combination valve,,,, ie, TXV plus throttle suctioning valve... you are getting too cold air out of the evaporator... then it is the valve.... but isolating on the upper side..I do not know how to do except by interpolating pressures... which I can not help on... due to lack of experience....

PS, I , myself, and me do not think one hour is enough to evaucuate the system.. it is not just the total inches of mercury of vacuum that you pull , you have to allow time for any moisture to get out...I know the old guys , with the old pumps which would not overheat if left overnight, preferred to leave it on overnight....You don't want ANY moisture left in there....