I have been looking at the Leopold 3x9x40mm Muzzle loader scope. My cva came with a Konus scope on it. But i wanted to upgrade it. I like the nikon. But only fount used one's over 300.00. Who make another good Muzzle Loader scope besides Leopold? I bought a new old stock nikon 3x9x50 buckmaster. But i want bdc for my ml setup like the Konus scope.