frontstuffer01,
I picked up a Vision about 8 months ago. I really like it so far. The only issue I had was that after a couple months the rifle stopped firing, something with the firing pin. I shipped it back to Knight and they fixed it free of charge.
I haven't had a lot of time to experiment with loads, but the most accurate so far was the 200 grain .40 cal XTP with the .40/.50 MMP blue sabot and 110 grains T7. The 185 .40 cal Lehigh was a close second. So far the rifle seems to like a lot of powder, so whatever bullet you use, I would suggest using 100 grains minimum, and try using 110 or 120 grains if you desire.