If your slug barrel is rifled, it's just as accurate as a ML, but with more rounds to fire, I'd rather have the 870 if I could only have one of the choices. I'd upgrade someday for a better scope, and test some differant rounds, and you'd have a real deer slayer there! If it's a smooth bore, then there's a differant story, They aren't quite as accurate, but still a good gun,many here who can only hunt in their state by shotgun will testify to that! Federal makes a rifled slug called Trueball. I've read great reviews on it. most accurate rifled slug in it's catigory! You can even change chokes, and go turkey, or goose hunting with it after deer season is over! Hope this helps!