The 28 camo model will not allow you to put the second shell in the mag tube after one is in the chamber unless you fiddle with it for five minutes.
I drug the 26" black model's butt stock through the water today and it wicked up a bunch of water so I went ahead and torn it completely down to blow out, dry out and lightly oil the assembly. I basically reassembled the shotgun. The initial fitting looked like a third grader did it-----deplorable.
I went ahead and shimmed it Cast On 1 to raise the comb and lower the drop at heal. The black one is solid now. We will see how it holds up. To get the SX3 up to snuff, it needs to be sent to a gunsmith new in the box to be tightened up and fitted. The fit on the camo is terrible, holes off, etc. and thus the warpage of the parts that make for smooth insertion of shells. It a only to a little while for the abnormal wear to ensue and problems to start. I would advise anyone to avoid these shotguns.
I am taking the offending model to a gunsmith to bring it in spec. I do not have the time or patience to jack with sending it to Arnold. It's a lesson learned. Back to the Etta's and Elli's.