Col. Batguano said:
That's an interesting observation about US Military rifles' wood treatments. I've read that they used RLO going back at least as the 1840's, and probably sooner. I wonder if they used that on the very first US Ordnance Department guns, which I THINK were the Committee of Safety guns of the 1790's.
I have collected information on the wood finishes used at Springfield and Harpers Ferry for a fair number of years now - including speaking in person with the Springfield NHS Curator on two different trips. Just about when one think's one has it nailed down, some new tidbit of info comes to light.
RLO was ordered/purchased by Springfield Armory from the very beginning. Some of it was used in new production Arms, but some was also used in the Arms stored there and for other uses such as lubrication oil and even treating cloth and some leather to make them more water resistant. So some folks have assumed RLO was all they used on the wood stocks.
However, I have read of procurement documents and got some information on others as early as from the 1810-20's, that Springfield and Harpers Ferry bought chemicals/compounds that would have been used as chemical driers in RLO. These were added when the RLO was "boiled" or rather heated and the chemicals mixed in to make the Oil Finish dry faster. BTW, this was known going back to at least the very early 18th century and the late 17th century.
During the UnCivil War Period, it seems Springfield went to using "Boiled" or heated RLO with chemical driers in it for most of the production.
Yet the Linseed Oil issued to or procured by Commanders all over the U.S. and Territories up through the UnCivil War, was Plain RLO and did not have driers added to it.
So there are still quite a few questions and explanations to be found.
Gus