Nah...most of the people in a gun crew in the '60s and '70s were involved, in one way or another, in pointing the weapon (setting and checking elevation and deflection) or setting fuses. They rotated from one job to another, so had to be able to do everything. Today, of course, it is much more complex because everything is electronic. The ammunition section's job was to (1) pick up 155mm shells at the ammo dump and load them in a truck and (2) take them out of the truck and stack them at the gun positions.