Yep - that first post explained it a bit.
Things didn't really change, just some loopholes used.
The limit is 5 rounds of the cartridge that the semi automatic centerfire firearm is chambered for.
Since the Versamax sport is chambered and labelled for 3.5" shells, it would be illegal if it held 6 rounds of 3.5" shells in the tube.
You can get 7 rounds of 2 3/4" shells in a sub-6 round tube, so therefore on this gun - 7 rounds of 2 3/4" in the tube is legal.
Ghost load one and put a round in the chamber and the gun can start with 9 rounds.