Haseb rocket? You are kidding right? Otherwise you do not know a single fact about rockets or artillery rounds. I spent over 20 years as an Artillery officer. I have forgotten more about munitions than you will ever learn. Look up the Haseb rocket - a six venturi rocket with an elongated fuse. Those rounds have NO venturi chambers at the base - absolutely smooth. No elogated fuse either. That is an artillery round, not a rocket. Might try to learn something about the subject. I happen to be an expert on the subject.
from the article: Lebanon army dismantles 4 rockets aimed at Israel