I think barrel, buckhorn(?)style, sights might not quite be what someone hopes for at that distance. Decent sights can get a bit pricey, but a set of MVA sights, with maybe a mid range soule sight on the tang, might work out. Ask the Shiloh folks, I doubt they'd do the hard sell just to run up the price.

The longer distance between the barrel position and the tang definitely helps, but being able to change front inserts and the rear aperture size might matter as different people see the sights and targets differently. If it's a plain model, there could be an off the shelf rifle in the ball park for a good price. Buying cast bullets might be a mixed bag when it come to consistency. Have fun.