Semi, I will say that's sure different than any way I have done it. i just cut them off and use an expanding rod square I made myself to square it to the inside of the bore with a file. The old German gunsmith that worked for me told me the important thing was that it end up square to the bore not to worry about the out side, we also used a one inch ball cutter by hand to put the chamfer on.
But I will say you did a lot of work and a nice looking job.

Yeah Lee. I went about it in my typical anal fashion that was maybe over cautious. But time is one thing I have available.

I'd be interested in seeing a picture of that homemade expanding rod square. I Googled "expanding rod square" and "rod square" and didn't get anything. Nor could I find such a creature searching machinists tool sites.

Nice work Semi. I've been thinking about cutting a few inches off my Pro Hunter barrel but haven't quite had the testicular fortitude to do it. I would also end up needing to re-install the front sight which has me the most concerned. But maybe with a few more of your DIY projects I just might try it.

You could re-matte the shine off that muzzle with a piece of fine Scotch-Brite pad. I would want at least a slight crown. A small grinding ball will work to do that (maybe a 3/4" diameter). I also used a small cone-shaped grinder to get just a bit more depth. You can then smooth it out with some JB patches under the ball... if you like.

Some of those groups you shot look like they want to break your 1" goal.