after a fail to feed issue and the replacement of the trigger housing assembly on mine, i had this issue. it went back to mossberg again. they said the action was hanging up and fixed it. i've only been able to fire about 125 rounds through it since, but i have only had 3 fail to ejects in those 125 rounds, compared to 6 or per a 25 rd magazine. something was not right with it when i got it back the first time...so i sent it back to mossberg. i would suggest calling them to see about repair.