Lots of info. I have my Linseed oil and when I get home tonight I will run a piece of paper under the barrel. And check it beforehand to see if the muzzle is hitting the top hand guard.
Hopefully the oil can somewhat restore the shape. The gun is otherwise as new and I hate to go hacking on something so original.
If I remember correctly, the barrel sits about 1/8 of an inch from the forend at the muzzle. I will take some pics and post them.