I will let this load run hot for a while, I'll see if I can get a burn time.
It's hard for me to give a real test on burn times. I always relaod in the morning because I have to leave for work, even though I still have a hot stove in the morning. Everyday I get 11 hours between loads, with mostly soft woods. After 11 hrs there is still good heat and lots of coals!
I suppose I would get about 5-6 hrs out of that stove/wood in my environment