Padeer, this works with my T/C Black Diamond:
1)pre-splay the sabot petals as far out as possible by forcibly pushing sabot 'face-down' against a flat surface. This'll allow sabot to open more quickly and consistently on leaving the barrel
2)place bullet squarely in sabot and start sabot in barrel leaving bullet nose flush with muzzle. This should be easy with T/C's QL Accurizer. I put little or no lube on the sabot itself.
3)place a modest 'ring' of crisco between sides of bullet nose and inside edge of muzzle. Don't over do it, don't try to pack it, just enough to get a complete ring of the stuff all the way around. Looking down at muzzle you should see the bullet nose in the center and crisco all the way around the nose out to the barrel steel.
4)put jag on ramrod and a tight fitting dry patch on jag and seat the sabot/bullet combination on powder. This'll force the lube down the barrel with the bullet. Lube will be in front of the sabot where it won't be as readily cooked by the load.
5)Withdraw the jag and patch in one motion (resist the temptation to wipe bore multiple times)
6)Handle every subsequent shot exactly the same way--don't overdo the Crisco, don't make multiple passes with the patch, don't smear a lot of crisco on the sides of the sabot--you'll get fliers if you do
Using this approach, I've put over 20 full power loads* through my Black Diamond without need for cleaning. Loading stayed easy. Group size has been optimal, for that gun, as well. As I recall it was grouping into about 2.5" at 100yd using 100gr. RS, 300gr. .44cal. XTP, and T/C Mag Express Sabot.
*full power for me is 100gr RS. If you use more powder or pyrodex pellets, this approach will fall apart at about 12 or 15 shots; accuracy will fall off and it'll get hard to load if you don't clean.
This is unconventional as heck, but seems to work. Does just as well in the .50 System 1, T/C Hawken-Green Mountain .50 and the Black Mountain Magnum.
Bob