I’m a bit of an outlier on this.

IMHO You don’t need more than one or two rounds in a shotgun for defense inside the house unless you aren’t very skilled and seriously contemplate a wave of zombies pouring into the house.

Most folks folks contemplating hd with a shotgun would be better off spending some time shooting trap (or even better, skeet) low gun than spending money on magazine extensions or other tacticool gizmos.

Since I don’t entertain zombie fantasies, I think of high capacity shotguns as pretty useless.