I found it, it's here:

Gunstock staining by SDH on custom and classic page of this site

Thanks very much Steven, that's great. I have some of the american walnut and medium walnut solarlux on the way to me, as well as the blood red that I already have. I'll experiement a bunch and also try mixing--although I didn't like the blood red color at all, I found the stain immediately to be very nice to use and I think very promising for me. Thanks for the tip.

I do have a question though--some of the photos of that particular gun look beautifully red (such as the one you re-posted above), while others in the tutorial post look very brown with almost no red tint. I know the photographs and color monitor can hide a lot, any insight into which you feel is a more accurate color representation in most light, and whether the linseed topcoat you used ont hat gun would change the color differently than a benn-matte or other finish?? Any insight into how fade-resistnat it really is over the years??

Thanks again for taking the time to post that--that was exactly what I was looking for.