I just bought a 686 with a 6 inch barrel 357 caliber. what kind of scope would you put on it if any.
I have hunted with scopes for many years, I also have with open sights and red-dots.
I find the red-dot to be a great alternative to the scope and iron sights. Quick target accusation and fast. I use and recommend Ultra-dot red-dots.
I still use iron sighted handguns, and scoped handguns, but I would say 70% of my handguns wear red-dot sights.
I just installed a Weigand mount and a Ultra-dot on my Ruger GP100 6 inch. I got it sighted in today at 25 yards, as soon as it warms up a little, I will head to the outdoor range, and get it sighted in at 50 yards. With my 357 Mag, I limit my shots to 50 yards, if I want to shoot past that I get a bigger gun.
If you are sold on a scope, a Leupold 2 X would be my first choice.