Is the fire rate on the pbv 301 correct?

I’ve read on some sources that the gun on the pbv 301, the 20mm akan m/45B, had its fire rate lowered from 725 RPM of its aircraft counterpart, to 300 RPM for vehicle use. Yet, I’ve seen the gun fire at the higher fire rate in the vehicle for promotional purposes. Since this higher rate wasn’t intended for combat use, should it be lowered, or should it be kept as is?