You keep using that word. I do not think it means what you think it means.
Ahhh....my misspent youth...
In BoB a hex is 40 yards across. Wikipedia tells me a Flak 36 has a range of 16,200 yards against ground targets. My calculator says that means the range of a gun is ~400 hexes.
Ugh....are you telling me that I missed an opportunity to put a 400 on a counter!