sabot............. I'm sorry, but I can't agree. I've burned a lot of T7. I was making a joke abut a truck load of patches, but there's no way in the world I could reuse a spit patch after running it down the bore of T7. I run it down on both sides, and they are caked with fouling. Sometimes it takes two to get the crud ring out. In which case i'll run a dry patch too.
I always use ML primers with T7. It only helps a little. They came out to keep the charge from moving. Not really to get rid of the crud ring. I can't count the times i've gotten the patch stuck in the crud ring trying to clean it out. It also has a habit of gumming up the breech plug threads.

I will never use it again. I see no reason to use it anymore. BH 209 is the perfect powder for inlines. An inline to me is a hunting gun. I put it in the same category as a centerfire rifle. Cost of the load is immaterial.

Now, for fun and blowing smoke. I shoot the Renegade and Hawken. For CAS I shoot two 1860 Colt C&B revolvers, 1866 Winchester 44-40, and double barrel coach 12 ga shotgun. All with real BP.

Cheap shooting is real BP and a PRB. Especially if you cast your own balls and buy BP in volume.

There's nothing cheap about shooting inlines. They become cheap to shoot if you just hunt with them. No idea how FG shoots his inlines so much? He must have won the lottery.