Better shells also reward gunnery and rate of fire

Even imperfect shells sometimes worked, so more hits could partly compensate for poor ammunition while reform was underway. Earlier evidence of the defect would encourage more gunnery, fire-control, and rate-of-fire training across the fleet. The battlecruiser force would receive that attention before Dogger Bank historically exposed weaknesses in its preparation. Better training increases the chance that the minority of existing shells which function correctly strike a target and do useful damage.