In the explanation offered here, 75 mm, 76 mm and 3-inch labels distinguish ammunition orders despite a claimed common projectile diameter. Keeping the service designations separate helps a quartermaster request the intended ammunition. The point concerns the relationship between naming and supply. The brief exchange includes no dimensional comparison of the rounds.
Notable Point · 3:15:23-3:15:46
Why 75 mm, 76 mm, and 3-inch guns kept different labels
A brief explanation connects distinct calibre labels with ordering ammunition for the intended weapon.