I got up yesterday morning with my 415 killer instinct cross bow and it was shot 4 times to set the scope , I put the wax on the string kept it in a case after getting it at rural king at the end of last deer season while I was hunting in my stand with a friend with it pulled back sitting in front of him with the safety on the kind exploded barely missing us both . I took perfectly good care the bow was never dropped scratches or damaged in any form or fashion owning several crossbows there is no explanation other than these things are not reliable point blank ..