Thanks Dwight,
What I don't understand is why is it such a big secret, Obviously because the rawhide needs to be wet and supple to be able to sandwich it and then form the holster there is a certain technique that should be followed, type of adhesive, etc. if adhesive is in fact used (I doubt it).
This guy on Google who says it's his trade secret shouldn't be afraid to pass it on. The proof of the pudding is the end result if he is, in fact, a master leather smith then his final product should speak for itself and blow away any competition if they use his technique.
I see some individuals use metal between layers rather than rawhide. In a lot of my knife sheaths I use the old boiled leather process and after I wet form the knife the sheath dries as hard as nails. I'm kind of thinking that if you sandwich the rawhide (wet) between the outer and inner lining leather but don't have the rawhide extend into the area to be stitched. Then sew the holster, use the boiled leather technique and form it to the firearm which has been wrapped sufficiently ( remember in fast draw we don't want a friction fit it has to fit loose) with layers of saran wrap or what ever to get the loose fit and then let the holster dry.
If and when the rawhide decides to shrink it will do so trapped between the boiled leather outer and inner layers. Not being held by the stitches it shouldn't cause the liner to bubble up as it shrinks. It should follow the predetermined shape of the holster.
I think this has to be the way it's done as I can't think of any glue that will bond to wet leather and you really don't want it bonded if it's going to shrink.