Frank,
To answer your questions, I have never owned or tried to carry/conceal any N Frame with a longer a barrel than five inches. However, at that length, I have had no problems with a my 27-2 and my two 627 Special Editions, all principally carried at four to five o'clock in a FIST, high-rise, FBI cant, OWB holster. I also use -- and like very much -- one other holster for five inch barrel N Frames. However, and I feel really foolish reporting this to you, I can't provide the specific manufacturer or model number right now, since it's locked in my safe, the house is being painted, and the is safe inaccessible with all the painter’s ladders, tools, and gear blocking that corner of the garage.
Regards.