I've got a few pics of my refinish job on my M1A, which has a Boyd's walnut stock. When I bought the rifle, the finish was very dull, like there was no oil at all. I used Teak oil, it's thinner than Tung oil and was designed to penetrate tight grained woods like teak and ebony. It takes more coats to achieve the desired finish, which I think is an advantage, since you more closely control the level of gloss you get. I use Watco Teak Oil. I put 4 coats on my stock, letting each one penetrate for an hour before wiping the excess, and allowed each wiped coat to dry 24 hours before applying the next one. I lightly sanded with 600 grit between the first two coats; after the last one, I buffed the stock lightly with 4-0 steel wool, and applied a coat of BriWax.
The first is a before shot, the second is after. I wasn't looking for something really shiny or polished looking, just a bit more than the plain wood I started with