Larger naval guns offer greater range and armour penetration, but the panel adds barrel life to the design trade-off. If a 12-inch/50 and a 13-inch/45 can provide similar reach and combat effect, the larger calibre can achieve it through a shorter barrel and lower working pressure. Lower pressure reduces wear, delaying an expensive and disruptive barrel replacement. This helps explain why the Royal Navy could prefer the larger-calibre option even when both weapons met the immediate ballistic requirement.
Notable Point · 2:06:02-2:06:59
Why a larger naval gun calibre can reduce barrel wear
A short gunnery lesson explains why a navy might prefer a larger-calibre, shorter gun when it can deliver the desired range and penetration at lower barrel-wearing pressure.