TTUgoldeye,

Congratulations!

The Knight Extreme .50cal topped off with Leupold 4X will be an excellent hunting and target setup.
Take care of this rifle and you will have many, many years of service.

2-hours range time with an ML goes by quick- huh?

Again, super inline package and welcome to the world of front stuffing ML's!

Don't worry about not being that "traditional". You rifle will shoot PRB (patch and roundball) with lighter loads likely very well. It will also shoot traditional black powder if you like.
Keep PRB's in mind for inexpensive and fun shooting or small game loads.

This happens to lots of folks; Bought my first muzzleloader and then before you know it, you will one day discover a sidelock percussion or flint and a bag of patch and balls have found it's way into your gun cabinet.

Stay shooting and keep us posted!