Get yourself a copy of Handloader magazine, OCT 2019, Issue #322, and turn to page #42, Pet Loads, 9mm Luger, by Brian Pearce. Lots of discussion on how to reload the 9mm, including taper crimps, and data for 300 loads. It should still be on the newsstands.
Now if you are looking for an authentic cartridge for the WWI Luger, try a box of Fiocchi's #9APC. It is a 124 grain FMJTC (Full Metal Jacket-Truncated Cone) that is the closest I have ever seen to the original German 9mm round that the Brits tried to get outlawed in WWI.
My top powders for 9mm are Power Pistol, AutoComp, Longshot, CFE Pistol, Universal Clays, Ramshot Silhoutte, and Accurate #5.