On this super high res "monitor of goodness" (it's not mine) The wood shows very well through the grunge. Gotta be beech! Little "white" highlights all over. Again, I think it's best to try a good cleaning before having a go with the stripper. If it doesn't clean up acceptably, THEN strip it. However, that means the grain will probably be raised, leading to further actions that can degrade the rifle further.

That's it from me on the wood, y'all drive on.