[Izzy_B]

Originally Posted by alsteel

This...http://www.military-today.com/artill..._howitzers.htm

Or even this.... https://youtu.be/Y_3f-cv3rR4

Most modern versions can be ready to fire in less than a minute from coming to a halt so I’d lose the need to wait a turn to fire unless it’s for play balance.

A turn is 4 minutes. Infantry dismounting from a vehicle don't fight or move the turn they dismount. It might or might not be reasonable to assume that during that time they dont have time to unhook the gun and do emplacement, calibration, loading and so on. Waiting one turn doesn't seem unreasonable.