Why is .380 ACP called .380 when they're really .355 diameter?
Why aren't they just called .355 ACP? Why the confusion?
- lestermountLv 71 decade agoFavorite Answer
The .38 special is also a .35 when talking about calibers there are often differences between the actual diameter and the name of the round.
Since everyone knows what they are talking about there is no confusion.