I’m lepton. That post was TO me, not from me. As a matter of fact, I corrected the numbers.
Yeah...we don’t know the initial temperature...or a whole bunch of other things, the total of which are of similar size as the reported results. Even how recently the balls had been inflated could play into it, as the air could have been even warmer than room temperature to begin with.
What the test demonstrates is that a temperature change of approximately 24 degrees can reduce the pressure by about 1.4 PSI. There are other factors that might change it a bit more.
Maybe the NFL will release enough detail to determine whether that accounts for it all, or not.
Oops, sorry, my mistake.