A friend of mine shortened a few .38 S&W cases and made 9mm rimmed cartridges out of them.
They fit into my S&W 940 and Ruger 9mm Speed Six, without using moon clips and ejected just fine (unfired).
I didn't actually fire them and cannot say if the cases will hold up to many reloadings. But they might do just fine.
I think these would work in a gun made for the 9mm Federal round. Any reason they would not?
Bart Noir