Just as important as the scope is the mount and rings. I highly recommend the Talley one piece mount and rings. This mount and bottom 1/2 of the ring is machined out of one piece of aluminum alloy. It is custom made for the Omega/Encore muzzleloaders. The cost is $49.99 from Talley and he will ship to your door within 3-4 days. Very solid high quality mounts that look great on a muzzleloader. The URL is below.

http://www.talleyrings.com/al.htm

I mounted a 3X9 Nikon Buckmaster scope purchased on Ebay for $132.00 and love it. The Nikon Prostaff 2X7 is another great choice.

Good Luck