Some of you here provided a lot of good information concerning the use of barrel sights, which I have eagerly studied. Many of you have patiently answered my questions, sent me old pennies, and posted pictures to help me gain the most from my barrel sights. Y'all have no idea how much I have learned here, and how much I appreciate the help. I have continued to experiment on my own, using your ideas and some older ones as well, and thought you might like to see what I have come up with so far.
I have several problems with the sights on my Sharps rifles, at least as far as the way that they fit ME and my guns. Please understand that I am in no way criticizing the stock sights, but that I am trying to get the most from the barrel sights for MY uses, which are casual field shooting and hunting, at least with this particular rifle. First, the stock does not have quite enogh drop, even though I ordered and received the "old" Roughrider configuration with a little more drop. The sights sit a little low for a "natural fit" with my big ol' head when I throw the rifle up to my shoulder. Secondly, the semi-buckhorn, particularly, sits so low on the barrel that in open daylight I get a lot of glare off of the polished receiver ring in front of the breechblock, washing out the sight picture. Third, the factory sights, while generally configured right, appear to be bead-blasted for a matte finish- this gives a great non-reflective finish for the most part, but leaves a lot of tiny rounded surfaces at the edges of the sight that reflect light back, also altering the sight picture. I learned early in my trials that the edges of the sight need to be CRISP, and ALL edges angled away from the eye to avoid reflecting this light (picture the outer edges shaped like a funnel towards the front sight, and the inner edges like the sight notch funneling away from the front sight).
I had run across some references and pictures concerning the Freund "More-Light" sight, and thought that it would suit my hunting needs here in the Appalachian woods. Current copies seem to be of questionable quality, based on input from others, so I thought I would experiment on my own, to save some money if I was not happy with the results. So, with some flat stock, a hacksaw, a drill, and some files, I cut out a rough sight blade incorporating some of the things I had learned about, and gave it a try. Here is what I came up with (disclaimer: I am no photographer or computer whiz, so please be understanding! <G> I learned a lot just trying to get these pictures taken and posted!).
Here is the roughed out sight blade in the white, from the front. Hopefully you can see what I mean about beveling all edges forward:

Here is the stock Shiloh semi-buckhorn that I soldered the blade to. I went this route instead of possibly destroying a buckhorn sight if I didn't like the results:


Here is the sight blade soldered to to the semi-buckhorn sight. Remember that I was after a taller sight to get the sights in a more natural line with my eyes:

A rear view:

Installed:

And a poor photo of the sight picture. To my eye, the rear sight is not nearly as washed out as it appears in this photo. This was the hardest picture for me to get right. You can see that the hole below the notch makes it easy to see the whole sight base, which also allows more consistent holds at longer ranges when you have to hold the blade high up out of the notch:

In some limited shooting in various conditions, I have found that this sight works very well. Accurate enough for informal targets, and fairly easy to get repeatable reference points at different distances for consistent holds.
I am about typed out, but hopefully this will show you something that seems to work well for me. I have a little more experimenting to do with the front sight; the copper penny that worked well with a regular rear notch now reflects almost TOO much light through this rear blade in full sun conditions, although it does work well in lower light. I'll post again when I figure something out.
Y'all take care,
Regan