Hello Oleg
I see you know about the website I a\was going to tell you about.
I have bought bullets from Beartoothbullets sized .432.
they worked fine.

In regards to mine DRD.
It is made by Nagel and Menz.
Probably pre WWI I was told by Krieghoff.

When I can I will post some pictures.
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If you like I can share my reloading data so far and results.
thks
ralph