I don't know what either of you guys are talking about. Both Linseed and Tung are polymerized vegetable base oils. The main difference between the two are the finish. Tung oil is high luster (as per the advertisement I linked

), linseed is not.
Another link...
https://en.wikipedia.org/wiki/Tung_oil
I don't know what to say to you other than Wikipedia is not the most reliable source of information out there.
I cannot argue about the molecular makeup of these oils as I'm not a chemist; maybe 100% natural tung or linseed oil polymerizes over time naturally as the article indicates, but the important thing to remember is they do so without the help of dryers or carriers. Those dryers allow for the oils to dry on the surface, which as others have alluded to, you don't want to happen. If the oil is sitting on the surface, it means it is not soaking into the wood fibres and not doing its job. You need to wipe that off or unwanted build up will occur.
Most information out there on the use of oils for wood finishing and re-finishing is geared to furniture - so I'd recommend reading that stuff with a grain of salt.
There is plenty of information out there on what manufacturers and militaries used on their service rifles, and this is the stuff you should be sourcing.
Maybe read the CMP article I posted previously.
Back to tung and linseed oil - Read the fine print, and go to the manufacturer's website if it isn't clearly identified on the container.
Sourcing the 100% raw form of both can be a challenge.
One used to be able to go to just about any local hardware store and buy the generic Recochem L.O. or Tung oil without the dryers and thinners, but that is getting tougher.
This is compounded by the vast majority of makers like Watco and Minwax now producing both without specifically stating the stuff in the bottle has dryers and carriers in it, and in some cases they are containing a lacquer, varnish or a polyurethane finish within the makeup of the 'oil'.