.380 is 9mm in diameter (standard to metric conversion). When people say .380, they mean the cartridge known as 380 Auto. When people say 9mm, they are referring to the cartridge known as 9mm Luger. 380 Auto is a 9mm in diameter, but a shorter length than the similar cartridge 9mm Luger. Don't ask about .38 and .357
KangzNSheeit 1 points 4 weeks ago
.380 is 9mm in diameter (standard to metric conversion). When people say .380, they mean the cartridge known as 380 Auto. When people say 9mm, they are referring to the cartridge known as 9mm Luger. 380 Auto is a 9mm in diameter, but a shorter length than the similar cartridge 9mm Luger. Don't ask about .38 and .357