Cleburn: best go up on line and look to see who sells cast slugs in the 308/309 diameter that are light enough for the 30/7.65 Luger.
Both Hornady and Sierra make jacketed bullets for that caliber: Hornady makes a .308 diameter 88 gn rn sp they list for the 30 Mauser and I think they may even have one in .309 for the 30 Luger, mayne not though. Sierra makes a 85 gn rnsp for both calibers in 308 diameter. The 308s shoot just fine (very accurately, actually) from a friend's 6" Naval Luger and I am (still) waiting for my 30 Luger caliber barrel for my Walther P-38 from a guy in Pa, if he ever gets off his dead azz and gets it done.
Hornady also makes a 1/2 jacket 308 diameter 100 gn bullet but I feel it is a hair to long to fit the 30 Luger as it is made for rifle calibers.
I would also check to see if anyone is making any cast semi-wadcutters for the 327. I have not yet seen any indication of what the bore diameter is on those but if it is close enough to .308/.309 you might be able to get whoever casts them commercially to cast for your diameter needs. Now, if it is a good copy of a Keith style swc it would probably be the perfect small game slug for those 30 bore pistols. imo.