Well, I'm kind of grinning because you are experiencing the same results that I had with the Brunco 190.
If I did keep that beast, here is a few things that I would try.
1) Put a spinner on the ash door. I found that by leaving the ash door open too much, it would tend to cool the fire and give poor results. When the ash door was cracked open just enough and stayed where I placed it, it would heat up faster and maintain the heat better, but still very fuel hungry.
I found that I had to put at least 80 to 120 lbs of anthracite coal in it to maintain good heat.
2) Keep the feed door spinner closed and the blower fan off. When I used the blower fan, it would only forge the fire up front and quickly put the fire out. The feed door spinner would also cool an anthracite fire very fast. It was okay for wood and bit coal though.
3) Try a manual damper before the barometric draft regulator. This will hopefully keep more heat in the very large firebox to facilitate a continuous hot burn.
4) If you don't need the radiant heat from the stove in the room, line the furnace jacket with foil insulation. This will allow more heat to get to the duct work.
5) I even once thought of reducing the firebox in half, by fabricating something over the rear half of the grates and adding another layer of firebrick on top of the ones sitting on the frame. This would allow for a deeper, more compact firebox that anthracite likes to burn in.
As for the bit coal, it did burn it quite well. It was hungry, made a ton of ash, made a lot of black stringy soot throughout the stove, stovepipe, and chimney, and would back puff regularly through the feed door spinner. If you want, go ahead and try some, but don't expect the same results as wood.
The Brunco 190 is a big wood burner with shaker grates and it isn't that efficient of a wood burner either. You probably used 1/3 more wood than you really needed to heat your place with a Brunco. At least that was my experience. They are well built stoves though, but lack the efficiency in design.
You have to remember that anthracite coal is slow and lazy, but once you got it going, you can maintain a nice hot steady fire. Just be prepared to go through the fuel, it's hungry.