I have a blue and white colored S&W mfg box of 357mag- 90g ammo.
Full box.
Who made this ammo for S&W?
Should I shoot it or save it because its S&W marked ammo ?

Oh yeah.... The head stamp on the cases say S&W! Pretty cool!

photo of ammo & box please?

Not certain, but I think most of the metallic cartridges (there were also shotgun shells) were made by Fiocci. And, as far as shooting it goes.....you might want to save it for somebody who enjoys photographing his/her Smiths with a period correct box of ammo (yours is probably from the 1970's or 1980's).

Yep , Fiocchi. Should say Made in Italy on the box.

If the box states "Made in the USA", then it was NOT made by Fiocchi.

Cases stamped "S&W-F" was during the time that Bangor-Punta had a hand in the S&W cookie jar.