I went the my extra die box and found a 38 seating die that I am thinking about modifying to a 9mm Largo sizing die.
I have been told that 9x19 or 38 Super dies can work but I want the correct size if I can achieve it.
The seater is slightly smaller than the Largo and the Largo has a slight taper to it.
I am thinking about annealing the die so it will machine easier and since I don’t plan to load thousands of rounds it should last my lifetime!
I may order a reamer and use diamond file to put a taper on it or make a “D” reamer.