A viewer identifies an ammunition difference concealed by the shared 4.7-inch caliber. The 40-caliber anti-aircraft gun used one-piece ammunition with a weaker propellant charge, while the 45-caliber destroyer guns used two-piece ammunition. This distinction receives agreement. British ammunition types add considerable complexity even within a single caliber.
Notable Point · 2:13:13-2:14:04
Why British 4.7-inch guns did not all use the same ammunition
The 4.7-inch family included one-piece anti-aircraft ammunition and two-piece destroyer ammunition with different propellant charges.