Generally a suib load (no powder, primer only) just gets the bullet to just ingage the rifling, cyles the slide if the spring is light enough, but wont let the next round fully in battery.
A round with a light powder charge can push the bullet far enough into barrel
to allow the next round to be chambered and fired,
causing severe damage to gun and shooter.
So yes, it could be dangerous in rapid fire.
so when reloading, make sure you see every case with the powder charge before seating bullet.
is there powder, and is the powder level in the case the same for all others before.