I have the same setup as you and get the same results. However, I don't use the same load. I am using 95 grs. of BH209 and the Hornaday 350 gr. FPB bullet.
I recently got my hands on some of the 300gr. FPB. I think I will take them to the range tomorrow and give them a try.
I only have one complaint on the Vision. The butt stock is too long. I will have to cut it down an inch. Aside from that, I love it.