I just had my 7.5" Single Six Hunter at the range this weekend (22LR and .22 magnum cylinders). I used to have a 2x scope on this gun and have hunted squirrels and rabbits with .22LR ammo (the 22 magnum ammo doesn't group nearly as well), but I'm getting a 12" 22LR barrel for my Contender, so I'm moving the scope to that barrel for hunting and just using the Single Six for plinking.
The Single Six Hunter is fine for hunting since it comes with scope rings that fit right on the barrel, but I found the gun pretty awkward fitted with a scope. The 12" Contender will be even bigger, but I expect significantly better accuracy and obviously more velocity. On the other hand, I like the Single Six for plinking, even with the long 7.5" barrel. Cheap shooting and good training.