Granted that a scope is relatively fragile, I would be inclined to start out with one, especially since my centerfire rifle already has a nice one. If it goes bad, I can easily remove it (giving me a couple of lenses for fire starting) and revert to the factory sights (which are sighted in). Fortunately, the rear sight is a peep, so I ought to be good for a bit more range than 50 yards.

I am with you in your preference for the 6mm Remington caliber. Good thing I like to hand load....