had the same problem with my 617. Out of 10 shots, had at least 4 FTF. called customer service and they sent me a return label, etc. After a quick turn around, I went back to the range and still had trouble with 2-3 FTF. Sent it back again, after 3 weeks it came back and is now working like a charm. Mine is temperamental and likes CCI and Federal. No problems getting the spent shells out either.