Ren - is exactly correct regarding the sanding of a stock and like I mentioned above properly sanding is really a skill that takes a long time to master.While I don't have the experience Wes has, I would like to give one piece of advice. Where most go wrong when refinishing a 50 plus year old stock is over sanding. It is easy to tell the difference between a professional restoration job vs an amateur, you will find it every time in a stock that has been over sanded. All the edges which should be sharp will look rounded over, it is the tail tail sign, so be careful when sanding and go slow because once the wood is gone its gone forever!
If you want to see an example of a stock that was poorly sanded take a look at the link below - Go To Post #23. This is a relatively rare National Match Stock that I restored. Post #23 will show the results of a BAD sanding job and you will see how I was able to correct those sins.....