I worked in sawmills for 42 years, as a saw filer.
Somewhere in my "treasures" I have a steel core military bullet we hit with a saw.
Someone was target shooting with old military ammo.
I had to weld in about a dozen teeth back in that saw.
Seems we were always hitting some kind of hard stuff. Rock, nails, bullets, insulators, etc.
Virgil B.
