Love it!
I have 3, mk's - one looks just like that one, but with a black scope on it. I set it up for my son. They are great guns, you won't be disappointed. Most that I've seen and used shoot very well with 90-100gr Pyrodex, and a 240-260gr saboted bullet. Try a load out in that range and see where the sweet spot is. Those guns are tack drivers.