RE: the so called cowboy rifles vs muzzle loaders
Jim, wouldn't spend the money on one of these "cowboy rifles" unless you are just dieing to have one. My H & R Ultra Slughunter has worked great for me. I also like muzzleloaders, just like the ease of carrying a few slugs with me instead of a goody bag etc, for the muzzleloader. The shotgun is also a lot less finicky, always fires. Since you already have muzzleloaders, just use those would be my advice.