Regulation problems are all over the board with the 24's, it's really is the luck of the draw.
The ones i've owned/fired, the rifle bbls were decent to quite good, and that's why guys brag on them so much. They just figure the bird shot will cover the rifle group no matter where it hits, but i need to see the CENTER of that shot go over the rifle rounds, NOT just over the edge of them.
Most shooters don't shoot well enough to even know what's going on, and they won't get any better with a shotgun like that!
DM