ORIGINAL: Chris_H
If I were you, I would get the TC Pro Hunter. The only thing is, it cost over 800 dollars. But it has the easiest and most advanced system i've seen. If recoil is such a big factor, it also has a stock system that reduces 48% of felt recoil. If you're on a tighter budget, go with the TC Omega. And buddy, I believe that 100 grains of powder is not enough for a 250 grain sabot.
I shoot mine with 90 grains "black mag" powder behind a 250 grain sst , works great .
There is a black powder forum on this board , you might get more responces there .