Hi Tony,
I think that a photo of the back side of the stock would have valuable data for forming the grip/trigger end, depending upon how
much detail you are creating... A lot of measurements of distances and curvatures might help too.

The impression is that you are aiming for say 80% of the finished product?

IMHO it is not a matter of putting up 4 or 5 pictures, pushing the loft button, and having a finished model.
The loft tool is helpful, and perhaps sweep and network as well... etc.