Thanks for the tip. Being a lefty I made contact with OldCop and bought his Nevada Gun Works upside down holster for my 642.
My concern is that the gun, with stock rubber boot grips, would not fully seat the trigger guard into the holster. And, if it does, will there be enough room to get my fingers on the grip for a proper draw?
I called Nevada GW and asked about this issue. They could not provide an answer.
Ken (OldCop) was nice enough to send me photos of his gun in the holster. His gun had a Tyler T-grip, which fills up almost as much behind the trigger guard as the rubber grips. Won't know for sure if this combination is going to work until I get the holster. OP-you may have the same issue.