Jim- I remember the article to which you refer. As I recall, it was indeed Briley doing the work. The purpose was to replace pitted chambers and the areas directly forward of them with new steel. The length of the sleeve (or liner, take your pick) was sufficient to contain the pressure until it dropped off to a safe level. Sherman Bell's articles in the Finding Out For Myself series proved this to be much closer to the chamber than most believed.
The forcing cone is unnecessary because the barrel diameter increases rather than decreases. The effect on patterns was an improvement.
This is all from memory and I 've been known to screw up in the past but all in all it sounded like a good way to put an otherwise good gun back in service.
Cary
