Leather stretches when wet, releasing support on the rubber lining.
I’m getting tired, so my math will need to be checked...
As a rough estimate - If the short axes of the ball expand as little as 1/10 of an inch from the smallest legal dimensions, assuming an ellipse, that’d be another .35 PSI drop, yes?
“As a rough estimate - If the short axes of the ball expand as little as 1/10 of an inch from the smallest legal dimensions, assuming an ellipse, that’d be another .35 PSI drop, yes?”
Good estimate if the rubber was totally soaked but I expect that it is not.