Are there reliable performance figures for the projected German 42 cm naval gun of the late First World War?
Short answerSpecialist books give figures, but the numbers conflict and may represent different sources or stages of the proposed design.
NotesThe question begins from a gap in an online naval-weapons reference. Specialist design histories are the best next source, although three different sets of statistics have circulated. Those disagreements may reflect the source each author used or the point in the weapon's development being described. A projected gun's range and performance should therefore be treated as evolving design data rather than one settled service specification.