Many mossberg autoloaders will not feed the lighter loads, at all. They say they will, but many of them have had problems. Their parts and QC are through the floor from the ones I've seen come through my store. Other than the complaint of "they're too light for crazy magnum loads!" referring to Novas, I've not yet heard a complaint on any of the Benellis I've sold. Benelli is known for quality, durability, and making a product to meet the requirements set forth for it (so long as you choose the right product for your need, you'll never be disappointed). Mossberg is known for......a tang safety and different spot for a slide release. I've had shells fall out of magazine tubes with Mossys, just from simple recoil (I have 4 witnesses).
Plan accordingly. I knew that if it was my choice, I'd always choose the Benelli; indeed, I'm saving up for one at the moment. The thought of the M4 has crossed my mind, but it might not fit my personal needs. I'll buy what does, and like many customers I've sold them to, will probably be very happy with my purchase.
YMMV.
