You're sure about this? That film is the first of two times in <10min where I ran into puffy, both times that fast, and the first time I had already lost a flap on maybe the 3d or 4th burst. That's the first thing.
The second thing is that there's no time delay in the box following you. There ought to be one. Just like in real life, the shells went where the guns pointed them at in expectation of the targets speed and velocity at the time they were fired. Just like we don't get instant hit-scan ballistics in the mannable 5" guns.