Non-corrosive primers that did not leave a residue of hygroscopic potassium chloride salt were not available until the 1920s. Powder (and later plastic) residue over salt over steel = pits. And I've seen some unbelievable craters just past the forcing cones.
Yes, I am in the EXPERT honing camp, and have been amazed that what I thought to be at least moderate pitting was cleaned up with only .0015 of barrel wall removal. If .0015 renders the barrel unsafe, it was likely unsafe to start with.
As a victim of a public education from K past post-graduate in the great state of Missouri, I could be wrong
