Tie265, I use stainless washers in pocket pistols. Yes, the washer will "cone" into the bottom of the drilled hole, but after that, it's not going anywhere. The arbors on the originals were rounded and bottomed out. I use 2 part Gorilla glue to keep them in place. It works fast and is stronger than JB. I dress everything down to give me a .0025"- .003" barrel / cyl clearance (endshake). Makes for a clean, efficient setup!
Mike