The idea of Primitive Weapons have many directions of thought.

I honestly can not see how States could list a single shot rifle as primitive. Is a Ruger #1 primitive. Or a Single shot 45/70 H&R. I would not say so. But what you need to keep in mind is, a lot of these States allow these other rifles to get more people into the hunting field. This is often done to control deer populations. So I think the State has to look at the needs of the herd management and the will of the people.