30 Luger reloading question...

[Mr. 16 gauge]

All the data I have right now for the .30 Luger uses a 93 grain FMJ bullet......however, nobody makes a 93 grain FMJ bullet anymore! I see that there are some 85-86 grain bullets out there for the .30 Mauser.....could I use these in the .30 Luger? How would I go about figuring out powder charges, ect. for this safely? Thanks in advance.........