The question of who knows why the Dvina in the Table Top Range 120 km.Question is good
... why is 120km range in the table, where the Dvina is only displaying maximum 110km.
The last SA-75M Dvina system was removed from the Hungarian service, 28 years ago.
I had a chat with its last Fire Control Officer, but he did not remember why
Non of the documentation I have, had any clue.
If I understand Your accent (as Russian), why don't you ask it in some Russian forums from the veterans, and share the findings with us?
Happy New Year!