Usually leading looks like "chunky" deposits at the rifling at the rear of the barrel, and as build up on the forcing cone.
In the chambers it looks like a sort of crusty enlarged ring where the chambers taper down near the chamber mouths.
A clean chamber will show a smooth ring-like area where the chambering reamer cut the chambers.
The Scotchbrite I warned against are the green abrasive flat pads sold in grocery stores and in auto and hardware stores in other colors (grits).
These should never be used in a bore or chamber.
What you were looking for is 100% pure copper Chore Boy scrubbing pads.
Last edited by dfariswheel; 06-07-2017 at 05:55 PM.
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