tung oil
I'd be concerned because it a film forming finish. Not what you ususally want on a pipe. Also most tung oil has a lot of adulterants. I prefer plain vegetable oil. Gun stocks are different - they need to be as inert as possible to keep the point of impact from shifting. The goal is to build a thick film on the wood. If that's what you want varnish is better. Vanrnish can bubble depending on type.
KL
sb in a Dunhill
KL
sb in a Dunhill