Fire Lapping | Single-Actions
2022-1-30 · Valve lapping compound is, I believe, carborundum, in grits coarser than desirable for bore lap. The finest grit valve lap might work for stainless, which abrades slower than chromoly. Each barrel which starts life with less-than-perfect gun-drill & rifling, or is damaged by subsequent operations, is a unique barrel, requiring individual ...