I have this rifle I believe it to be a TOTW Isaac Haines 32 inch barrel Give or take; in 50 caliber. The rear sight like many classic muzzleloaders has a very narrow sight line forgive me for not knowing the correct nomenclature. Please see picture attached. I have not used this rifle too often and not spent any time trying to figure out what is the best load. I have shot it enough both off hand for which I can’t hit the broadside of a barn; while in a rest it repeatedly shoots 6 to 8 inches low and a smidge to the left. I have a difficult time with it off hand which I attribute to my back hurting and the rear sight being too narrow. I generally shoot at 60 yards and would be happy to have a lollipop zero at this yardage no big deal right. So I think I know I have to take the front sight down to bring the point of impact up? My problem is I seem to have a problem aligning the rear sight with the front once I have the front on target. I would like to open up the rear sight so that when the sights are aligned I have a light gap left and right. Right now there is none just solid when all lined up. So the rear sight to narrow. I can always replace the sight id like to be able to see more light at the left and right of the front sight when sights are aligned. So before I mess things up I figured I’d ask the experts. Is there any rule for what that diameter should be? It definitely less than 1/16 and I think because the sights are closer together than my 40 or 42 inch barreled rifles I’m not getting the sight picture I need to align the rear with the front? Is 3/32 to big or does it not matter to a point? Thanks in advance!