Instead of trying to make a slug gun more rifle than SHOTgun(which it will never be), why not just use a rifle? Just sayin'
If I could I would, but the Socialist Republic of NJ says I can't use a centerfire rifle to hunt deer, only a shotgun or muzzleloader, so I have to make do.
I have to admit though, even when I hunt in NY, the catskills, there are certain places where despite being able to use a rifle, I prefer the sluggun. There's a lot to be said for a large, heavy, 3/4 to 1 ounce foster slug traveling sedately at 1600 FPS getting through thick cover and finding it's way to the boiler room of a white tail. And anyone who has tried shooting foster slugs and rifle bullets through mountain laurel to a target on the other side of it knows exactly what I'm talking about.