Don't underestimate the accuracy of those little Colt Frontier Scouts. I had one when they were first introduced, one of the dual-tone guns. It was deadly accurate and accounted for its share of squirrels.
For the record, I prefer to start a novice on a Single Action since once the shot is fired, another shot is not readily fired without thumb cocking that hammer. So if the shooter does something dumb, there is less chance of a negligent discharge.
As to Single Action accuracy, my first target revolver was a Ruger Blackhawk Flat Top .357 Magnum, loaded with .38 Specials. Earned a Sharpshooter rating with it in bulls eye competition.
Even today, some fifty six years and 17,000 rounds later, it still works for me: