I took some photos of my rear sight install today. Here's the progression:
I first marked the placement of the top of the sights dovetail on the barrel. Since I already browned the barrel I use duct tape to ward off any "slips." Then with a hack saw (and good blade) I cut close to my top marks:
I then use the hacksaw to clear out as much material in-between the two outer cuts:
When I'm filing out the material, I do a lot of depth checking with the dial caliper. I do have to remember that duct tape provides about .005" of thickness:
When I get it all "cleaned up" I then begin the process of cutting dovetails:
I check the dovetails a lot when I'm fitting the sight. I had a "good" dovetail cut in the barrel, so I decided to remove some material from the sight to fit the barrel. I had to be very careful that I didn't remove to much sight material from the "top width" or I would have a gap between the barrel flat and (once inserted) sight.
I completed the install. Now, recall that I said I use duct tape in order not to mar the barrel if I slip on any part of the install. Well.....I had the tape off to change it for more visual clarity and I said..."A few careful strokes and I should be fine." Yeah.....a few strokes in and I slipped....no tape....and caused the minor scratches you see on the lower left part of the flat. These are minor and I'll just let nature take it's course in rusting it. But.....just for half a dozen strokes......
I'll brown the sight and re-install it, knowing I'll likely have to adjust (file) either the front sight or the rear sight when I am doing load development.
I know most know how to do this, but I just thought I'd post my "how I did it" for us amateurs.
Oh....one more pic from front of barrel with sights installed: