Here's my take on scopes: I don't use them but if your eyesight requires a scope in order for you to continue shooting a muzzleloader than for Heaven's sake use one. If you are not concerned about being HC/PC, that's okay by me. I'm not all about bing HC/PC myself. I just enjoy shooting my muzzleloaders. Claude doesn't want us to discuss modern scopes. It's his forum so we play by his rules. So, just don't say what kind of scope you have and let's just assume that it is an acceptable brass scope.
I tried a brass scope on my T/C Hawken and found that it was more trouble than it was worth. It was in the way when I was cleaning the barrel and I had to use less effective (in my opinion) methods of cleaning. I used one of those tube thingies in my nipple hole. It worked but the end of the tube kept coming out of the bucket when I ran the patch down the bore and spraying water all over the place. The other problem was that the spray from the firing of the cap on the nipple would spray corrosive "stuff" on the scope causing it to become very discolored with corrosion. To prevent this, I polished the scope and then wrapped it in leather that I laced onto the scope. This prevented the corrosion on the scope and did not look too bad. Another minor problem was the spray from the cap would get onto the rear lens of the scope and would require frequent cleaning of the lens. In the end, I removed the scope, plugged the mounting holes with screws and went to a peep sight. I still have the scope and mounts and if I ever get to the point that the peep sight will no longer work for my eyes, I'll put the scope back on my rifle and keep on shooting as long as I can.
So, if you need a scope, use a scope. Do whatever you need to do to keep shooting that muzzleloader. I'd rather see you shooting a muzzleloader with a scope than sitting at home playing checkers. :hatsoff: