Need help w/ammo

[P. J. Heck]

Went out w/Krieghoff commercial and 1938 S/42. Krieg would not fire Egyptian sub gun ammo at all making well defined ghost on all primers (7), fired Norince ammo everytime but wouldnt cycle. Single round would not let toggle catch hold open. S/42 gun fired Egyptian sporadically, 4 of 7. Fired Norinco w/same result as Krieg., many malfunctions from failure to cleanly eject empty to not cycling far enough to strip next round causing stove pipe jam. Also tried current mfg Win military stuff. Worse than Norinco. I had some cupro nickle jacketed WW 2 Chech that really worked well, very hot, intended for MP 40 and Lugers interchange probably. No malfunctions what so ever. Unfortunately this 'armor piercing' round has been listed as 'non importable as is cop killer', and I am out of it. Has anyone found a source/mfgr of ammo hot ehough for the Luger with out having to reload. I am reloading 8 different calibers now and am reluctant to add another for a gun I dont shoot that often?????