Stan,
You would be surprised how much you can do with a drill press or even a 1/2" "drill motor" in a vise and a file until you get a lathe. A lathe is a necessity of life, even if you don't hand load. Anyway, with only .005" difference, manufacturing tolerances in the rims vs. the chamber/headspace may allow 9.3 cases to fit (cases have to be the same or smaller and the chamber has to be the same or larger than the listed standards).
Mike