Are they locking in and then falling out in the act of firing? If so you have a bad spring. Yours would make it the 7th spring in this batch. I sent this batch to coating with springs attached and some of them have seemed to get weaker. I don't know if the coating process has some adverse effect on them or if the quality control just wasn't good from the factory. Pm me your addy again and I'll send you some more uncoated and see if that doesn't fix it. Sorry for the inconvenience.