22 mag rimfire. say it on the gun.
No such caliber as .32 Special. Use the caliber of ammo marked on the gun.
any 32 cal. revolver ammo.
380
Only use ammunition that the weapon is chambered for. If you are not sure, have it examined by a gunsmith
A Phoenix 25 would use 25 Auto.
6.35 mm is equivalent to 25 ACP
Have a gunsmith check it. many different types of 22 have been made
45 ACP. Have it checked by a gunsmith before firing.
You need a good gunsmith.
20 gauge #71/2 for bird/squirrel. Buckshot for self defence.
These were made to fire the .32 S&W revolver cartridge. Made well after the black powder era, they should be able to use standard present day ammo.