In my duck club we have 5 m2s, 4 of them jam, we also have 2 SBEs. One never jams and the other jams the same as the M2s.I have read a lot of posts about the jams . Mine is broken in, 5 or 6 cases. I talked to Benelli and they refuse to admit that the problem is a defect from the factory, althought thes guns have jammed since day one. Have been told to lube it more, told to lube it less, change shells and I have done all of this. Still hangs up about once every 50 rounds. I have read about what some of you have done to cure yours but I do not understand why it does not jam ever time or at least more often. Makes no sense to me why every 50 or so rounds. Any additional info. would be greatly appreciated. I also have added the Wolf heavy duty springs, no help. THANKS!!!!