The wife carries a Bersa and has not had any problems since hitting the 500 round mark, our standard for break in. I did pick up extra mags for it so they may not see the cycle rate of just one mag, but they are all kept full.
Try tapping the back of the mag against the heel of your hand before loading the mag into the pistol to settle the rounds. A LEO friend swears by this to eliminate any feed problems.
Please post anything you find that fixes this issue so I can keep on top of the wife's carry gun. I kinda like both of them.