I think states are split on this subject, some states are more of traditional style muzzleloader, they don't want inlines etc....and no scopes...other states, if they allow mondern muzzleloaders, they often times will allow a magnified scope. I think if you allow modern muzzleloaders, you shoudl allow scopes. if you're a traditional flintlock etc...style state, then I dont really see the point of a scope, other than a 1X maybe. Some staties allow 1X which can be nice to look through vs. rifle sights. I don't really know, if I ever get a muzzle loader it would be a modern style, so I would wish everywhere allowed inlines/with magnified scopes.