I'm assuming that it will darken as the oil begins to oxidize. The SB 600 flash on my Nikon is bright enough that it makes the color appear lighter and redder than it actually is. The stock was poly'd before I refinished it so I definitely didn't harm an original finish.
Here's a picture of the stock with the poly clearcoat prior to being refinished...
Here's a picture of the stock (before wax) without the flash washing it out...
Okay she looks alot better!!!