Konrad, all of the forgoing suggestions should help. Before spending any money give this a try; I have a reprint, 1964, (in english) of the original DWM Luger manual, The "Parabellum" Automatic Pistol. In it DWM recommends using nothing but 'vaseline' on all working parts for lubrication. Give this a try making sure to grease the sliding rails and everything else well with it to see what happens. Assuming the magazine 'lips' are not deformed it just might cure your problem.
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Utah, where gun control means a steady trigger pull
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