Heydrich, glad you liked the Luger. I think the terminology you are using is misleading. What you are most likely refering to is a failure to feed, not a misfire. I understand a misfire is a round in the chamber, struck by the firing pin that doesn't ignite. This wouldn't be affected by the magazine positioning. Magazine positioning would definitely cause a failure to feed, therefore resulting in not having a round in the chamber and no firing. If the magazine doesn't sit up exactly right with the exact spring tension the Luger is the worst I've ever fired in that the bolt will ride over the round, not picking it up for chambering. Send the magazine that doesn't work down the line, the gun's magazine catch isn't aligning with the slot in the magazine well, keeping on jamming it in will wear the gun part down. Now you have an idea of why magazines were sn#d to each gun. Take the left grip off the gun, watch the magazine catch as you slowly insert the good magazine, then insert the other. Don't lose the magazine catch spring. With your background you should take to a Luger quite well.
RK <img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />