I just wanna add that my 250 m stroke had a touch and go at 200 m flight ( GIR ) but skidded of the green. Mike Austin is a legend of having hit a ball 515 yards of the tee. I hit mine from a position where the ball was lower than my shoe soles and at delofted club face angle ( loft i3 equivalent ) at very high speed at least 110 mph where the ball leaves the club face at 160 mph having 0.5 N of drag. I was also in slighty elevated postition in comparison to the green ( 5 meters / 15 ft ).

I was told it was a flyer..but maybe it only had less rotation than normally hit balls.