I don't think you can go wrong with the '51 Navy. Shooting at 15 yards should allow for some nice groups. The '51 Navy is just a natural in most folk's hand's. They point very well, (something in my opinion that most manufacture of these replica's got right.)
If the grip feels good in your hand, the chances of it doing what you want is greatly improved. I like the steel frame revolver's. They allow for a heavier charge if you desire that. They are also better balanced. :imo:
I have owned and shot one for over twenty years, and I've got no complaints. :thumbsup: