A workable interwar ammunition-selection system

Could an interwar autoloader select ammunition from reserved magazine positions?

Yes, but it would need tightly controlled stowage, powered transfer, simple sensing, and human operators to verify each loading step.

Rather than modern robotic picking, the concept uses prearranged ammunition positions, powered transfer, simple sensing, and operators who confirm each stage. Shells could move from controlled stowage onto a conveyor and into a drum or hoist. Propellant bags required their own arrangement so that full and partial charges could be selected safely. The result would still be manually actuated and closely watched: machinery removes heavy handling, while people supply the sensing and decisions that period technology cannot.