"Want to do some engraving on stock and on ironwork"
I presume you mead "carving" with regard to the stock. I have both Wallace's and Jack's tutorials and highly recommend them both. They have quite different techniques, so are quite complimentary.
If you are just starting out - as I am, I would strongly recommend starting with Everett Ellenwood's carving tutorial. It is not longrifle related, but I believe it does a better job of presenting the basics of carving. This is in no way intended to down-play the value of Wallace's and Jack's tutorials! I recommend studying it and then moving forward to Wallace's and Jack's. You can find it at
http://ellenwoodarts.com/main.htm . You may also be able to find it at the library - I did.
Hope this helps
Laurie