im pretty sure the 9mm cartrige is bigger than the 380. So the 380 cartrige might not fit inside the 9mm die.
You cannot re-size 380 brass with a 9mm sizing die, nor can you size 9mm brass with a 380 die. You can use the the bullet seating dies back and forth. But you'll need to get sizing dies in both 380 and 9mm. The shell holder and primers are the same for both.
It is: 380 minus 357 = 23
The heaviest bullet in my reloading manuals for the .380 is a 120 grain cast bullet.
about .03 inches
.380 ACP is a specific type of ammunition made. 380 LCP is the name of a Pistol, made by Ruger which fires the .380 ACP round.
Bullet diameter on a 38 is .357; on a 380 it is .355 Case is longer on a 38.
Yes
3.62 kg
.380 is slightly larger in diamater than the .32, and in general, more powerful.
2mm in case length.
The case of the 9x18 cartrdige is 1mm longer and the slug is slightly wider. In metric .380 ACP is 9x17.
The 9mm Parabellum is longer than the .380 ACP (also called the 9mm Short) They do not interchange.