I don't have a clue since my only Black powder experience is cap & ball revolvers. However, any gun for $100. sounds like a good deal to me.
I know there are members here that shoot the sacred black and hopefully they'll be along to help you out.
Please post pics when you can.
“If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that ye were our countrymen.” ― Samuel Adams