The one and only 12 ga. I have is a Mossberg 500. Chambered for the 3" shells and the bitty old 2-3/4". No, Mossbergs aren't as tight as the 870. Still, my Mossy is very reliable and accurate even with bead sights. I love it, and fall deeper in love with it every season. That gun has put alot of meat on the table. For the price of even new ones, you can't beat that shotgun!!