Clearly roundshot from artillery can plough on through it's first target and hit something beyond. However I am having difficulty conceptualising 90 degree angle bounce through.
If I understand the rules correctly the following happens:
An artillery unit has two equally eligible roundshot targets - let's say two infantry units in column perpendicular to the front of the artillery both at the same distance. The artillery can nominate either unit as the initial target and then the second one becomes the bouncethrough target.
This means that after ploughing through the first unit the roundshot jinks at a greater than 90 degree angle to then go through the second unit?
Plausible?