Iver Johnson top break .32?

[John Owens]

Just got back from the gunsmith. He told me to shoot it all I wanted. He's never seen one in as good a shape and this one. He ordered me some shells which will be here Tuesday

 

[TTv2]

If it truly is a .32, you can get away with shooting some factory .32 S&W (short, not long) ammo. There are so many of these .32 S&W short top breaks out there, both from the black powder era and smokeless, that the ammo makers loads all their .32 S&W Short ammo to bp levels.

Were it a black powder .38 S&W, I wouldn't shoot it with any smokeless, but yours is .32, so I concur with the gunsmith, shoot and enjoy, but don't do it frequently.