Even though I haven't commented, I have been watching this thread with interest.
FWIW I just got a new M2 in late March. Haven't had a single problem with it.
I have shot a bunch of light game loads and patterned some turkey loads thru it and have not had a single failure to cycle, nor have I had the problem of it shooting high when using the bead for turkey targets.
However, when I do use the bead I make sure my cheek is low on the stock so that I can't see the top of the rib. That's the way I've always used a bead when shooting turkeys.
The only concern I have with the gun is that it’s really light…considerably lighter than my Remington 1187. That being said the M2 really kicks when shooting 3” Magnum turkey loads through it. Luckily, I don’t shoot that many turkey loads.
Other than that I really like the gun.