That bounce height...
Totally depends on temps and strikepoint height.
If you bounce a ball chest high in Florida in 90 degrees, it won't reach hip heights in California where I live, in 52 degree airs and fog rolling in.
And if you can bounce that first flat serve waist high in 52 degree airs with cold balls, you will easily get that serve to bounce upper chest high if you raised your strikepoint and hit the same in 90 degree weather.
Dunlops bounce lowest, Penns second, Wilsons are astronauts.