Originally Posted by
rintinglen
Mine is a 1938 S/42 Mauser Werke gun, also one of the 90's imports. Mine was supposedly imported from Estonia after the wall came down, but I offer no guarantee of that info. My guess is that given the mags worked with other ammo, the problem is that your loads are not strong enough to drive the bolt back far enough to allow it to consistently pick up the next round. I would not modify the gun. I would first try seating the boolits deeper, if they are longer than 1.08 inches. Second, I'd try raising the load slightly. I'd also make sure that my gun was squeaky clean and well lubed. It doesn't take much in the way of grit or grunge to cause your luger to run raggedly.
My luger won't run unless I am loading right to the top. I use the Lyman 356-242 ~122 grain boolit, and when I started developing a load for it, it was a single shot until I got I got up to 4.2 grains of WW231, and wasn't fully reliable until I was nearly at the book max of 4.5 grains. I use 4.4 grains for the Luger, while most of my other guns run just fine with 4.2 grains under the same boolit @ an OAL of 1.10".