Originally Posted by Bill DeShivs
Bugs don't eat steel.
That's true, but bugs nest in tubes. I found a .30-30 barrel once that had been a nursing home for dirt daubers. The mud plugs hold moisture in the barrel. When I finally got it cleaned out, there was almost no rifling in the end of the bore. About the last four inches as I recall. We shortened the barrel, re-crowned and it turned into a shooter.