I don't have a CVA Wolf, but if I were starting out the rifle, I would start at 80 grains of T-7 and the 240 grain XTP's. I think you might get good accuracy with that. If you get good groups, you can try the two pellets also. You might also want to look at a lot of different projectiles out there. Powerbelts should shoot well out of it. I would look at the 245 and 295 grain and try them with the two pellets.

Good luck with the rifle and I hope your father enjoys black powder shooting....