Hot', everyone's definition of "distance" varies. I've got preconceived notions of what Maryland looks like (having never been there) and it doesn't lend itself to the wide-open, target laden artillery ranges like the desert West has.........refer to Mackay's posts for photos of such places. Anyway, assuming you're maybe restricted to a 200-300yd public range, I would forego a scope for now. If you've got truly poor eyesight then do what you have to do however.
IMO a 6" M29 is a mighty handy revolver, and mounting a scope on it will fug that up a lot. Spend the $300 on ammo or components to build ammo, and work on your distance skills. I think you'll be happier in the long run. My .02c.