I've ended up with a couple of Lugers that had the same issue. After some examination and thought, I removed the trigger, and clamped it in a vise, and gently drove the top of the trigger notch down slightly, so it would engage the trigger bar sooner. Worked great, and no extra material needed. Go gently, a little goes a long way.
https://forum.lugerforum.com/attachm...1&d=1658018091