How many artillery rounds does a train gun man us in the civil war?

Answer 1

Federal artillery outnumbered Confederate artillery since the South only had one foundry capable of producing cannon at the start of the war. Even their battery sizes were influenced by this factor; 6 guns to 4 guns per battery for the Union and Confederacy respectively.

Train guns or rail artillery was also predominately Northern since the South couldn't produce railroads; only repair and use what was available. An excellent gun crew was capable of firing 3 rounds per minute, which coincidently matched an excellent infantryman who could fire 3 rounds from his muzzle loader rifle or musket.

As to how many cannon shells (or cannon balls) a railroad gun might carry depended upon how many were available, the size of the car (trailer), and the caliber of the shell; larger shells meant less shells could be carried.