I recently received a new 10 rnd magazine for my CF380. I loaded the magazine and had planned to leave it loaded for a few days as that seems to be the prevailing suggestion here for mag break-in. Out of curiosity I cycled a few rounds through just to see how the new magazine felt. The new magazine seemed to obstruct the slide about 50% of the time making it impossible to rack the slide, also a failure to eject/feed was common. Also had it hold the slide open after I had pulled the slide back to eject a round, this happened twice in the process of running the mag empty. Needless to say, I was a bit horrified. In it's current condition this magazine seems totally useless. My 8 rnd mag runs flawlessly with the same ammunition through the same gun. Do I just need to let the mag "rest" with some rounds in it or is there some clean-up work I need to do to refine the shape of the 10 rnd magazine? Or did I just get a lemon mag? Any one else hit this issue?