Par4QC
...and the attack angle. Between this and what u said about launch angle, he'd get another 10'yards of carry and probably total of 330.
The cobra f9 today with the Atmos black 6x I was getting 13 degree launch, spin around 1800, ball speed of 164 with a + angle of attack and was getting 280s in carry and 320-325 total. Club head speed was 110ish.
Those shafts are expensive...