“If they are checking 12.5 psi using a digital gauge, then that gauge likely has 0.1 degree increments. I would certainly have to have 0.5 pound increments.”
You meant .1 psi increments I’m sure...
Pressure gauges for tires do not. They are common and inexpensive. I’m quite sure they don’t make a special one just for footballs...
You’re right I meant 0.1 psi increments. As to the availability and cost of digital gauges with small increments:
$25 gets you a digital gauge with 0.05 psi increments, designed for exactly the purpose of measuring pressure in game balls. I guess they won’t be needing to borrow your tire pressure gauge after all.