I recently purchased a Army Issued Walther PP. Ive tried two different magazines and the problem still accures. The Pistol cycles fine. Ejects brass just fine. The issue is when it picks up another round, the hammer drops and does not stay cocked. It does stay cocked maybe once out of a full mag if i get lucky. Ive cleaned it. Got all the grud from all the tiny spots. Im thinking about a wolf spring upgrade kit but i want a second opinion first. the ammo im using Fiochi 73gr 7.65mm. I can take the magazine out, Recock the hammer and push up on it to try and get it to drop and no issues have accured. So idk if its a Hammer issue, a Spring issue or a Ammo Issue.