1st coat was Kibler's tannic acid. After that dried, I used two coats of iron nitrate. Then I used a heat gun and the stock turned dark as coal. Then I used a maroon scotch guard pad to rub it back and expose the end grain. The pad was kept wet with a yellow stain that I think also came from Kibler's. If not then it was straight from Laurel Mountain Forge. After I got it where I wanted, I followed up with 4 coats of Tried and True oil.That's nice. What did you finish the wood with?
Now I can't prove it, but I swear the stock has darkened over the last month. I'm seriously considering stripping it down and trying to bring out the background yellow. In direct sunlight It really looks cool. The picture was taken with overcast skies.
The barrel and hardware were browned with the Laurel Mountain Forge product. Second time I've used that and it's easy to get a great looking outcome. I did let it go a little longer than the directions said and the finish was a bit rougher than I was shooting for. Even with the baking soda scrub it has kept rusting for a couple weeks.
The pic below is right after I put on the last coat of TnT oil.