The octagonal barrel version is a 3 screw frame and the '1860' style has a 4-screw frame. Which is thought better???
Both of the 1860's (round barrels) have some light contact between forcing cone and barrel, but the octagonal variant has a clean gap, about .008" or so, between the cone and the cylinder face.
Each of the 1860's have a 'double click' as the hammer comes back, whereas the octagonal barrel version locks cleanly with a single click, so I would have to say the octagonal version, while ugly as sin, seems to be the better pistol as far as set up is concerned.
What should the forcing cone gap be????