This is an issue where states have a right to establish firearm control laws that supercede federal law...

As of the last time I looked (could have changed recently), in KY a muzzleloader is not considered a "firearm" as long as it is not or can not be made into a centerfire OR does not detonate its powder charge in-line...

So a side-lock muzzleloader is acceptable (primative / antique)...whereas an in-line muzzleloader is unacceptable regardless as to ignition...

A TC Renegade sidelock is acceptable...
A TC Encore / Omega is not acceptable...