ok, so i've had 4 fte's in about 600 rounds. any cause for concern? i see people here bragging about thousands of rounds without a failure to anything. they've all been with wwb, and all the casings look "normal," although i'm not sure what to look for in a faulty casing. and not exactly sure what limp wristing is, but i'm pretty sure i'm not doing it, altho 2 of the fte's came from my roommates when i was teaching them how to shoot. also, if the general concensus is to take it to the gunsmith, what could be the culprit? the extractor appears to be intact and clean. thanks.