Sea Buck,
I'd like to be able to tell you that there is on sabot that is perfect in all rifles, but that is simply not the case. All rifles will like a particular kind of sabot and bullet combination, and will shoot that combination better, and more accurate than any other. Some will load easier than others, but may not be as accurate.
You will have to experiment with your loads, just like everyone else on this forum has done, to find what your rifle likes to eat. It becomes a little expensive, but is well worth the effort when all is said and done.
My suggestion would be to contact MMP sabot company, and talk to them and see what they recommend. I would also look into buying my bullets in bulk and try to get away from the $1.00 a shot bullets you are using. There are lots a bullets out there for muzzle loading that will do a great job, so there is no need to pay for a name.
Just my $.02