If you intend to wear the revolver beneath a winter coat or parka, The out-of-production Desantis swivel shoulder holster is particularly useful.

Its advantage is that however you might "yank" revolver from holster, whatever your position - including prostrate - holster follows your hand's drawing vector.

I owned one for an 8-3/8 inch "N" frame into which my Ruger SRH 480 fit beautifully.
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While I do not know whether any emulation of this holster is in production, I do know that Desantis' holster was a close copy of another [unknown] maker.

Hope this helps.