Well, I finally broke my self-imposed light up restriction of Dec.1st last night, & started burning Blashack for the first time. Definitely getting longer burn times, more consistent sizing, alot less fines & MUCH less wood & debris, & seems to have less ash also. With Kimmels I always had to shake down twice a day, but with this first load going 15+ hours, I think I can get away with once a day. The current load has been going for 13 hours without any signs of slowing down, so I'm going to let it fly until tomorrow. Ash is definitely whiter that Kimmels, although alot of that was the charcoal used to start it, so I'll have to check the second ashpan full tomorrow AM.
Took 1- 3/4 forty lb. bags to fill my Mark III with a couple layers of charcoal burning over the grates.
So far, so good!