I have a 91/30 Mosin-Nagant I recently acquired and at the time the gun looked to be in good condition. However, after removing the stock, I found 3 spots on the outside of the barrel where pitting had taken place. These spots are between 1/4 and 3/8 inches in diameter. After removing the rust with a dental pick, I measured the depth of the worst pitting. It is approximately .030 inches deep. Should this rifle become a wall hanger or is it still reasonably safe to shoot. I know this is a stupid question but I still have to ask if the barrel can be welded to fill in the pitting or will this just weaken it further?