Who’s coned their smooth bore?

[Eterry]

Probably never going to do any of my rifles but been thinking of doing a .62 Smooth bore. Who’s done it and what are your thoughts?

I haven't shot or even seen a smoothbore that was coned. I'm having trouble understanding why you'd want it coned, but hey, it's yours. Whatever floats your boat.

 

[Capt. Jas.]

Many 18th century fowling pieces proper had their muzzles relieved. I guess one could call this a type of coned muzzle but it was not designed for shooting patched balls as that was not a thing in the period for smooth guns. While this was in no way a choke, it was one of the early attempts to make stronger shot patterns.
Pictured below are two "Griffin" pattern barrels (actually based on a Spanish barrel off of a Griffin gun), one has been relieved at the muzzle and the other is as made.

 

[Kansas Kid]

Many 18th century fowling pieces proper had their muzzles relieved. I guess one could call this a type of coned muzzle but it was not designed for shooting patched balls as that was not a thing in the period for smooth guns. While this was in no way a choke, it was one of the early attempts to make stronger shot patterns.
Pictured below are two "Griffin" pattern barrels (actually based on a Spanish barrel off of a Griffin gun), one has been relieved at the muzzle and the other is as made.

Interesting, kind if back bored but from the other end.

 

[Capt. Jas.]

They would also relieve or "roughen" the breech area as well.