I own a .30 Luger Mark II HP and the comments by Will are true. The slide does weight less, the recoil spring is lighter, and the external barrel diameter is smaller than that of the 9mm HP. I orginally purchased the .30 HP because I wanted to turn it into a two caliber pistol. But after an examination, I realized that it would take a whole new top end with barrel to get what I wanted. Instead I looked around and ending up buying a NIB Mark III 9mm HP for only $450. Ended up buying a Mark III .40 HP so I could own all three factory chamberings.
My .30 Mark II shoots accurately with the Winchester and Fiocchi 93 gr FMJ factory loads. Neither of these two loads are full power. Both chrono at 1161 and 1163 fps respectively. The original 7.65mm Para DWM factory 93 gr FMJ load was rated at 1250 fps in the 4.5 inch barrel of the Model 1900 Parabellum pistol.
I finally got around to buying some of the Hornady .308" 90 grain XTP-HP bullets and handloading them using Win cases and Win 231 powder. My starting load was a bit warmer than I expected. It chrono'd at 1277 fps in the HP. Primers were flattened but not excessively so. Next time I load I will drop the charge about 2/10ths of a grain and see what happens. Every now and then I read a post on assorted gun forums from someone who wishes that there was a factory loaded .30 Luger JHP load. Such a load would certainly improve the stopping power of the .30 Luger, but in reality I see little point in using the .30 for self defense unless that is all that is available. Why use a .30 Luger when you can have the 9mm Luger on the same platform.
Roadster
My .30 Mark II shoots accurately with the Winchester and Fiocchi 93 gr FMJ factory loads. Neither of these two loads are full power. Both chrono at 1161 and 1163 fps respectively. The original 7.65mm Para DWM factory 93 gr FMJ load was rated at 1250 fps in the 4.5 inch barrel of the Model 1900 Parabellum pistol.
I finally got around to buying some of the Hornady .308" 90 grain XTP-HP bullets and handloading them using Win cases and Win 231 powder. My starting load was a bit warmer than I expected. It chrono'd at 1277 fps in the HP. Primers were flattened but not excessively so. Next time I load I will drop the charge about 2/10ths of a grain and see what happens. Every now and then I read a post on assorted gun forums from someone who wishes that there was a factory loaded .30 Luger JHP load. Such a load would certainly improve the stopping power of the .30 Luger, but in reality I see little point in using the .30 for self defense unless that is all that is available. Why use a .30 Luger when you can have the 9mm Luger on the same platform.
Roadster