There has been a lot of talk about artillery deploying to far in front of the controlling Corps.
Maybe it's a idea to "place" tha artillery batteries as dedatched units to stop the guys going off to far in front, I have been trying to estimate the cannons ranges and measure that on the 2d map so you deploy the cannons within that range.
From the manual, which gives a fair enough idea of where to place the cannons if you have sight of the enemy.
The table below gives the firing distances for the artillery classes in the French army:
Class Maximum cannonball distance / Maximum grapeshot distance
12 pounds 1800 800
8 pounds 1600 600
4 pounds 1250 550
Howitzer 800 500