Thanks everyone for the kind words on the refinish! I have another that had a much better stock that only got oiled, so the above is my "shooter/beater." It shoots great, by the way...tons of fun.
To answer mdib's question about the oil:
True tung oil is 100% oil, and is hard to find. You can get it on Amazon and other online vendors but I've had no luck finding it at Lowes, Home Depot, or OSH.
Most of what you find is "tung oil finish" like Formby's, which is a mix of the oil (or oils) and some varnish.
With pure oil, it will dry more slowly and usually requires more coats, and will often tend to wear more quickly (although you can always simply apply more). The varieties with varnish will often dry more quickly and because of the varnish will be a bit tougher, but the look will be determined by the varnish (matte, gloss, semi-gloss). It also adds a layer of varnish that wasn't original to the gun, so it isn't ideal if you want the piece to remain in its best collectible state.