The 3pdr regimental guns were used during the Scanian War as well as during G II A's time with infantry regiments and was placed in the gaps between the battalions in groups of two or three pieces. Each regimental gun had a crew of 4-5 men and 3 horses.
Re-deployment forward or backward occurred in connection to the infantry movements during the battle, At regroupings during battle they took the help of the infantry to move the pieces as the horses was to difficult to handle in the battle situation. They neededn the help of about 15-16 extra men to regroup a 3pdr regimental gun.
The regimental guns opened fire on the 600 m distance from the enemy soldiers and would then reload during the march forward. After firing the shot, they would be advancing forward in steps so they came about 50 m in front of the infantryline. At approximately 200 m would stay and proceed to give fire with grape shots. The infantry then went beyond the regimental guns for theirs attack.
The regimental guns was expected to continue to fire during the battle, even after the infantry had passed them at the 200m point. They usually followed the infantry that was advancing to charge the enemy. As they had friendly infantry on both sides of their firelane they had to return to shooting with solid cannonballs.
During the Carolingian period the Swedes leave the custom to place the heavy artillery in front of the main infantry line. The started to place the heavy artillery on the wings or between the different combat units (Left wing, Center and Right wing), if they even bothered to bring it during their swift marches. They took into account the terrain and tried to place the heavy artillery on heights in groups of one or two batteries with a variable number of guns. The batteries were their own fighting units with their own commander but some collaboration between the batteries.
In conjunktion with the other troops in the rules that are 12 or 6 minis we, at least for the moment, decided to let all guns have 6 crewmen, playtest will show if we alter it or not.
As most guns aren´t sold with 6 crew you can use other stuff as "crew men" just to keep track of how many hits they have taken and to see if they are at full or half strenght, it dosen´t really matter if it is 6 actual men with the gun,
So for my Regimental gun I have 1 single crewmen (1), one powdermonkey (1), one horse with civilian horseholder (2), and one more crewman with barrels and powder (2) to get the full crew (6). I hope you got it :) and of course if you are luckey to have spare gun crew, please use 6 of them to each gun.