Thanks everyone. I have had the honor of building a couple of sets of rifles for family, my next project is another pair of rifles for brothers.
The shellac will mix with the BLO. I use a 50/50 mix. If the mixture dries too fast, add a little more BLO. If it dries too slow, add a little more shellac. I mix up a batch in a jelly jar and it will last for a long time. Just shake it up good before you it if it has been sitting awhile. The mixture will separate if it sets for a while.