[rhuff]

I am wondering if the Luger was NOT assembled correctly when you purchased it, but now it is correct. The toggle train should require a fair amount of pull strength for it to retract fully. Sounds as though your magazine is causing you at least part of the problems. Perhaps the hold open spring is another part. I would start with a new Mec-Gar mag or two. WWB, PMC, Magtec, etc. ammo should be good for you. Most Lugers don't like Russian steel cased ammo, or Remington ammo(some do).....trial and error.