i can hit 300*-325* at home.
twice at comps
even at home it's a struggle. couple things i've noticed...
with the 22.5 outside temp is a major factor in reaching higher cooker temps.
higher temperature=more charcoal in the ring right? i don't think so. i feel the stoker fan can't get proper airflow to the top of the mountain of charcoal to stoke the fire.
haven't been able to experiment yet with that last one and less fuel for higher temp.