Have it checkd by a good gunsmith before firing.
Best thing to do is to ask a gunsmith for help.
Yes, 380 or 9mm from a model 58 or 59 is the same pin...
No! Both of those cartridges are ACP where it uses the mouth of the case to establish proper head spacing and to prevent the round from dropping too far in to the barrel. The cases are of different lengths. 9mm is 19mm (.754in) and the 380 is .680 in. The 380 will drop in to a 9mm barrel, but would be dangerous to shoot. The action of a 380 will not close on a 9mm.
No, the calibers and chamberings are completely different. It is not safe to attempt to fire any caliber of ammunition in a gun, other than what is stated on the barrel. actually the 380 caliber is almost equal to the 9mm. the 380 caliber is often refered to as a 9mm short. the difference is the 9mm case is slightly bigger then the 380 case and the 380 bullet might be a little lighter.......................
380 and 9mm ammunition IS NOT INTERCHANGEABLE.
380 and 9mm ammunition IS NOT INTERCHANGEABLE.
If the two calibers are close in size then no. For instance, do not carry .380 and 9mm at the same time. The .380 will fire in a 9mm and could possible plug the barrel. The next shot will blow the barrel.
25-125 USD or so
The .380 IS a 9mm- a 9mm Short (also called 9mm Kurz or Corto). There are more than a dozen different 9mm cartridges. Most people mean the 9mm Parabellum (also called 9mm Luger) when they say 9mm. The 9mm Parabellum IS a longer cartridge than the .380 .
9mm and 380 both use bullets with a diameter of .355. However, the cases are a different size. .380 is also known as .380 auto, 9mm Kurtz, 9mm Corto, 9mm short or 9x17. 9mm typically refers to 9x19mm also known as 9mm Parabellum or 9mm Luger. You cannot fire a 9mm Parabellum cartridge from a .380 handgun. The 9mm cartridge will not fit into the chamber of the gun. However, if you were to pull the bullet out of the .380 case and put it into a 9mm Para case the resulting cartridge will work just fine.
Assuming you're referring to the 9x19mm (also known as the 9mm Parabellum or 9mm Luger) and the .380 ACP (also known as the 9x17mm, 9mm Short, and 9mm Kurz), the answer is no on both counts, and it would be extremely dangerous to try this.