The next step is restoring the barrel. Most of the rust is surface rust but there are a few areas with pitting. Deep pits can't be done away with as it would remove too much metal. Some pits will remain, its just a fact of life.
Before I submerge the barrel in naval jelly I Use a lot of 320 grit and steel wool then the barrel spent a half hour in the jelly. Once the barrel is rinsed under hot water I use 400 and then 600 grit and 0000 steel wool to clean it up. Lastly I polish the barrel on a flannel buffing wheel with red rouge. The results are a real improvement.
This video does a better job of showing the polish job on the barrel.
https://www.youtube.com/watch?v=kgOKW2rzH7s
The next step is bluing the barrel. I start by plugging both ends of the barrel with wood plugs that act as handles. Then the barrel is scrubbed with acetone to remove any oils that would prevent the blue from taking. I used Dicropan cold bluing. Here are results.
Here is a video of the blued barrel.
https://www.youtube.com/watch?v=oRh4BA-aRO0
Even though there are still at least 3 more applications of tung oil for the wood, I think its time to put the entire gun together and take some pics and video of the restoration so far. I can always take it apart to finish the finish.
And here are some videos of the gun.
Right side
https://www.youtube.com/watch?v=qedH...ature=youtu.be
Left side
https://www.youtube.com/watch?v=pdNm...ature=youtu.be
After 2 or 3 more applications of tung oil I will buff the finish to a glass-like smoothness and give it a few coats of paste wax and this gun should be good for a few more decades and with a lot less kick. When the weather improves I will give it a shot to see if it still makes me cry like it did 40 years ago.