I have seen a 6 shot and an 8 shot but not a 7.
i have a 8 round shotgun but it's 7 in the magazine tube and 1 in the pipe. so 7 was just talking about the tube. think I would have to have a 6 shot 500 to be able to use those other barrels.
i'm reading about rifled slugs now. will just have to give them a shot. will probably head out in a minute to look for a regular stock to replace my knoxx pg. will order the green hogue in a week or so maybe. ill give the bead a try but im thinking a red dot would be a good option.