Guys I got my first Mossberg 20ga shotgun when I about 13, as a gift from my father. I still shoot that shotgun and it has taken a bunch of dove, squirrells, rabbits, and one whitetail buck. I also have a 500 camo turkey shotgun with the prted barrell. So, I went to the Mossberg web site to check into getting a slug barrell, and saw a muzzleloader barrell for the model 500's. Does anyone know much about these? Anyone have one? How does this work with a pump shotgun? Any info would be appreciated.