I use 124 grs Hornady RN and 4.8 grs. 3N37, works good
on this luger. The gentleman who sold me this luger
had good experience with geco 124 grs. ammo.
In our days it is possible to cut hardend steel up to 60 HRc.
You need a good endmill and a rigid machine tool.
To cut hard steel "Kobelco" -Tools work really well.
I am operating a Mori Seiki milling machine to cut hard steel.
The stock was made on a Fanuc Robomill.
regards
Otto
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