Depending on what load you are shooting, I've been told that the Lever-evolution load for the 45-70 will match up perfectly with the Nikon Omega Muzzleloader scope. I had two Omega's, they worked well when I remembered to use the circles. Old habits are hard to break, I never used the circles. The scope was awesome though. Perfect size for a 3-9x40 IMO, and tons of eye relief for the hard kickers. Great optics too. I would imagine that the Slug Hunter would match up pretty well with the heavy bullet loads and the 45-70.