dchartt wrote:the hi stat is my operating temp, you really want that set all the way to 200?...not second guessing you just making sure
If the L4006A mounted on your boiler is currently set at a higher temperature than the "HI" control you have set at 160, then yes...the "HI" will control the operation temperature because it is "first in line". The red wire leaving that LO/HI control should go to the L4006A, and from there a yellow wire should go back to your hopper-fire sensor. If that is how your unit is wired, try the settings I posed above. The boiler should shut off at whatever the L4006A is set at (try 180).
What model circulator are you using to circulate through the Coal Gun? It looks like a Taco 011 or something similar, and I bet when it kicks on after being off for a few hours your boiler temperature gets flooded with room temperature water. Keeping the coal boiler at a higher temperature will help the system recover faster, but you may still need to throttle that flow a little.