you will not only not finding reloading data in the united states but also not on another place on this planet

original ballistics was 665 m/sec with a 21 gramm bullet, have all the reloading stuff but no time to work it up with modern powder.
my common powder is Vithavuori N 140 and something like 50 grains would be a starting point with the 330 grains softpoint

original DWM pre war cartridge and handload with horneber case and degol bullet