Thor,
Thanks much for that pic of the target, along with the load info. I've just gotten geared up to reload .30 Luger for what I consider one of the all time best pistols ever made in that caliber, a mint '69 or '70 SIG P-210 soon coming to me from another board member and friend here.
Youre comments on bullet diameter stopped me, though. What diameter do you recommend? I'm set up to either cast them or swage jacketed bullets, so I could tailor my own dies to a precise diameter for the latter.
I guess that, inevitably, reloading this round will lead to one or more Lugers in that caliber.

It seems to be the way life works.
Have you clocked that target sheet load? My Lee data shows velocities in the 1400 FPS range. This would be quite an accorate, flat shooting little screamer, with jacketed soft point hollow points. Yet they say the cartridge was originally considered too anemic for military use, so George Luger went to 9mm Para.