Put all three plugs in their respected MLs and leave them outdoors (first thing in the morning) loaded horizontally standing, in sub-freezing weather for an entire day and then shoot those three, just prior to night skies.

That's when you may notice a difference in performance level....... or so I was told. The country's East/Northeast is where 80% of muzzleloader shooters partake. More humid there (versus South Dakota) and might be the proper place for that test.