Heated pine tar might give the look you want. There's a guy on YouTube that does it to his Mosin stocks they come out very dark. His name is Logcabinlooms and one of the vids is named A sermon on pine tar. Don't watch his non-instructional vids, outside of skills he's a flake and what's worse an annoying one.
There are a lot of people on there using dyes. Rit dye has changed formulas a few years ago so you want to watch a newer one.
I dyed a stock in '10 using the vids as my guide. Turned out well. Two years ago I did a Mosin. Very happy with the dye, the Mosin is a truck/barn/cache gun and is ugly enough.
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