Florida CCW,
Sorry to hear about your problems. I too had probs with the Hydrashoks feeding but only with the last round. Mine is at Seecamp being looked at right now.
Have you considered talking to Larry? If you call the tech number on the Seecamp website, Larry actually answers the phone and is very personable and helpful. When I talked to him, he said he doubted it was a problem with the ammo because Hydrashoks have such tight manufacturing tolerances. However, now that I hear others are having the same problem, I wonder if it isn't an ammo manufacturing problem after all. By now, Larry may have spoken with Federal and found out one way or the other whether it is an ammo problem. Who knows, you may be able to save yourself the hassel of returning the gun and finding and winning the bid on another .380 by simply calling Larry.
If you got a good price on the .380, it may be worth it to send it in to Larry for a tune up rather than returning it to the Seller. They really do stand behind every gun for the life of the gun and the warranty transfers with the gun.
Whatever you end up doing, I hope it all works out for you.