Just purchased a new to me Bar B Chef offset smoker. I am having problems getting it above 230. Curious; how full do you normally load your firebox? I am graduating from using a weber kettle and I can get that up to 300 with very little charcoal. I have about 5 starter chimneys worth of coals and lump mesquite and with fire box vent wide open only hit 230. I know my temp is accurate. I use a Thermoworks Thermo Q. I have the thermo Q thermocouple style sensor mounted on the grate center of the smoke box towards the back. In the smoker is one chicken and one rack of ribs.