Fred,
The Borescope is great, but I wonder if I'm over reading what it's showing me. Some carbon staining ahead of the chamber isn't the same as carbon build up. I may be wanting the bore to look perfect and that may not be pratical.
The carbon build up I've seen looks like a black top road. Those are the ones that take so much work to take down to bare metal. When I get a new barrel and break it in right, that just doesn't happen.
Using a borescope and just looking at patches is the difference between daylight and dark. Those patches often lie...
DF
