Some people may have cycling issues in their brand new 930's.
For about 95% of these cases, run full power loads through them to "break in the action" My 930 SPX would not cycle Wallymart ammo until I ran three boxes of full power magnum slugs (you may need more, just to be sure. Some have run 20-30 before getting to this point)
Some of the earlier runs of 930 SPX's had the front sight alignment issues (the front sight was off a few degrees and would not warranty them) If you come across one and cannot resist the urge to purchase it, flip the shotgun upside down and lie it on a known/measured flat surface. The "wings" of the rear ghost ring sight should rest square on the surface *and* so should the "wings" on the front sight. If the front sight is off, it will wobble alittle or alot.
If there is wobble present, walk away. No amount of bubba-ing will fix this unless you get someone to re-solder the front sight in the proper position.