Thanks for the info. I think that I do have a good scope in the Nikon Prostaff scope. As far as re zeroing, I hope to have it sighted in for one barrel, then move it to the other barrel and figure out how many clicks up or down, right or left, and get it real close that way. fire a couple rounds to test it, and then be ready to hunt. When I move back to the other barrel, I will already know the number of clicks to turn, test fire, and ready to go. I just wasn't sure if I needed a shotgun or rifle scope for the muzzleloader.
Thanks