Bigtimer
A suggestion, try several different sabots at home with the breach plug out just push them through if they are easy to load they wont shoot good if they are so tight that they are difficult to load they proably wont shoot.
Its not that any particular sabot is better than any other but that barrels run from .496 to .504 and you have to match the thickness of the petals of the sabot to the barrel. The TC guns will usually work with a Crush Rib or a HPH24 [one or the other. the Harvester black short and long are close to the HPH24. The black Knight sabot or MMP 12 usually work in the Savage or the Knight or the Red Crush Rib. If it fits your gun try the blue 50/40 with a 200gr XTPbullet or the 200gr SW they have ahoot some amazing groups for me at 150 yds and are the flatest shooting bullet I have ever shoot in a muzzle loader. Lee