Chris,
While still a novice builder, I've achieved a deep dark red with Dangler's stains, sold by Jim Klein. First, several coats of the orange (very scary), then two coats dark red, two coats golden brown and finish with dark brown as needed. After that, several coats of garnet shellac, finished with Chambers oil finish. Of course, I tested many combinations on scrap wood before attacking the stock.
Check out Mike Brooks' gunbuilding tutorial who also uses Dangler's stains.
Bill