Quote: while 155mm cannons in the real world have ranges of 20 miles or more.
When you said that I did not believe it because a WWII 16 inch naval gun, 406mm, had a range of about 25 miles. From what I have found is that you are exaggerating by only a little bit. From what I have found is that the maximum range of a 155 Artillery gun is 30km or 18 miles. There is a 155 Artillery gun and ammo that is under development that would have a planed maximum range of 47km or just under 30 miles.
Since 1982, the South Africans have had an operational 155mm artillery piece with an unassisted range of 39km, or 53km using shells with base bleed to reduce drag.
It's interesting what range enhancement a few tricks in shell aerodynamics can achieve.
-------------------- Mike Miller, Materials Engineer
Disclaimer: Anything stated in this post is unofficial and non-canon unless directly quoted from a published book. Random internet musings of a BattleTech writer are not canon.