Cris,
Since .323" bullets won't fit into a fired case you might try .321" (32-40,32 Win. Special), even if they don't fit, they would be easier to size to .318". The new Flex Tip 32 Special bullet has been receiving favorable comments. My caution about case length is because I had to break down 8x57 IRS ammo because the shoulders bulged in handloads made up from "Once fired" RWS cases and Norma bullets. It seemed the RWS case was crimped into the crimping groove on the RWS bullet which caused the neck to stretch enough to cause the shoulder to bulge, seating the Norma bullets. One trimming corrected the problem, but I remembered the incident.
Mike