The only thing illegal here in DE is "Smokless Powder".This came out of F&G shortly after the new Savage was introduced.
Don't know if its a safety issue or they feel its pushin the limits on Muzzle Loadin.

Off Topic - But,
I like the suggestion on single shot rifles.Having been weened on Center Fire for Deer,I think Shot Guns are a panty waste for Deer hunting.It ain't never gonna happen in this old state!