Question: After so many years

[Roman]

Thank you very much Pat. Its application is very useful.
Now I know that when the artillery has ap ammo is killing tanks. I thought that was ap ammo for direct fire.
I also noticed that the ammunition is in heavy artillery, de155mm up.
I've also seen some artillery has HEAT ammunition. That if it is to direct fire?
On the other hand you could tell me if what I say is right?
AP and sabot ammunition are effective against armor.
HE ammunition are effective against soft targets (men and trucks)
I have doubts in the HEAT ammunition are for armor too?
For bunkers in particular that ammunition is best?
Another question that was the question 2 above post: I've seen some assault guns have HE score in that indirect artillery calculator app. Generally most has 1 and assault guns caliber have 2. What does that mean?
I only took into account the score to kill.
Sorry for abuse your kindness and a sustained barrage of questions.