The .38 Special can fire .38 Special, or .38 Long Colt. It cannot fire the .38 S&W, which is fatter and shorter.
Yes, you can use .38 rounds in a .357.
Your Rossi revolver fires the .38 special cartridge.
you can shoot standard 38 special rounds out of a firearm marked for 38 special +p
No.
Yes
A .357 Magnum can shoot .38 Special rounds as well as .357 Magnum rounds.
Post 1972 detective specials are rated for 3,000 rounds of +p ammunition but Colt recommends that after 3,000 rounds they be sent back to Colt for inspection.
No, you can only use .38 caliber rounds.
38 Special; yes.
No.
38 Special and 357 Magnum
Yes, you can use .38 ammo in a .38 Special firearm as they are compatible with each other.