I have one as well and I call it my "boring muzzleloader" because it's so comfortable to shoot, clean and will shoot everything except slip fit conicals well.
Here is a group I shot out of it after it had sit for 2 years without being touched.
I've shot XTPs (from .400 200g to .452 300g) Deep Curls, Barnes, Shockwaves ect. Anything out of a sabot will shoot well out of mine. I only shoot Blackhorn out if now but it shoots 777 just as well.
Good luck with the new gun and let us know if you have any further questions.